diff --git a/grammar.peggy b/grammar.peggy
index eb4f6cb0b..283457e1a 100644
--- a/grammar.peggy
+++ b/grammar.peggy
@@ -612,7 +612,7 @@ LineBreak
   }
 
 ScriptCommand
-  = mode:[_\^] __h v:Argument {
+  = &{ return math.on } mode:[_\^] __h v:Argument {
     if (v.kind === 'Block') v = v.value
 
     return {
@@ -622,6 +622,15 @@ ScriptCommand
       value: v,
     }
   }
+  / char:[_\^] {
+    return {
+      kind: 'Text',
+      loc: location(),
+      source: text(),
+      value: char,
+      mode: 'text',
+    }
+  }
 
 DiacriticCommand
   = '\\' mark:SimpleDiacritic __ chr:([a-zA-Z0-9] / '\\' [ij]) {
diff --git a/index.ts b/index.ts
index bb3dd18f5..dd281c907 100644
--- a/index.ts
+++ b/index.ts
@@ -327,6 +327,8 @@ export const fields = {
     'verba',
     'verbb',
     'verbc',
+    'xref',
+    'crossref',
   ],
   html: [
     'annotation',
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index 3d66eae96..2942ba799 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap
index f0696de6b..84e340e57 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -127,7 +127,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -197,7 +197,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index a44b6a31c..04df7ffb0 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index 597ed9f93..09b48a702 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -185,7 +185,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 3b6feeb4b..50e02dd3e 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index 4545d6536..3f0841c39 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A <span class=\\"nocase\\">Frame Tracking Model</span> for <span class=\\"nocase\\">Memory</span>-<span class=\\"nocase\\">Enhanced Dialogue Systems</span>",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 8a66388b7..e92f59614 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -142,7 +142,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index b451fed2d..f1f28dea3 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -139,7 +139,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.after.biblatex.snap
index 3fc8f60c6..2e97140a4 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap
index ab306d194..174a6f770 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.before.biblatex.snap
index d50c1e6a2..5110db794 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap
index 01e2602c7..49121dd3b 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap
index bbfc485b7..48f134f56 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index 3d66eae96..2942ba799 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap
index f0696de6b..84e340e57 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -127,7 +127,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -197,7 +197,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index a44b6a31c..04df7ffb0 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index 597ed9f93..09b48a702 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -185,7 +185,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 3b6feeb4b..50e02dd3e 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index 4545d6536..3f0841c39 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A <span class=\\"nocase\\">Frame Tracking Model</span> for <span class=\\"nocase\\">Memory</span>-<span class=\\"nocase\\">Enhanced Dialogue Systems</span>",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 8a66388b7..e92f59614 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -142,7 +142,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index b451fed2d..f1f28dea3 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -139,7 +139,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap
index 3fc8f60c6..2e97140a4 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap
index ab306d194..174a6f770 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap
index d50c1e6a2..5110db794 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap
index 01e2602c7..49121dd3b 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap
index bbfc485b7..48f134f56 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index 13fe75ccf..f707cea1a 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 2c0f1248c..5fb4819f4 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -127,7 +127,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -197,7 +197,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index ea5e9c738..ee0fc9a2b 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index a80c25c53..270a75ffd 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -185,7 +185,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 1fca007f2..393a1b3b8 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index b70f06688..1d683f8e2 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A Frame Tracking Model for Memory-Enhanced Dialogue Systems",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 19785aa33..e7129b983 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -142,7 +142,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index d0061796d..32141cfdf 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -139,7 +139,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.after.biblatex.snap
index 68ae9f04a..e3baacb80 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.after.coll.biblatex.snap
index 5fc2c025b..122b66e2f 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.before.biblatex.snap
index 6d01accc9..35568c12b 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.before.coll.biblatex.snap
index 10bd7915e..e4bfe6923 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap
index bbfc485b7..48f134f56 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index 13fe75ccf..f707cea1a 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 2c0f1248c..5fb4819f4 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -127,7 +127,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -197,7 +197,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index ea5e9c738..ee0fc9a2b 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index a80c25c53..270a75ffd 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -185,7 +185,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 1fca007f2..393a1b3b8 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index b70f06688..1d683f8e2 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A Frame Tracking Model for Memory-Enhanced Dialogue Systems",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 19785aa33..e7129b983 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -142,7 +142,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index d0061796d..32141cfdf 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -139,7 +139,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap
index 68ae9f04a..e3baacb80 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap
index 5fc2c025b..122b66e2f 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap
index 6d01accc9..35568c12b 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap
index 10bd7915e..e4bfe6923 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap
index bbfc485b7..48f134f56 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index 0f367ba6b..b37792835 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 53f1d6332..ffe75022a 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -127,7 +127,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -197,7 +197,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 9c2dc35b7..40825b416 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index 25e9df5b8..573f07cfe 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -185,7 +185,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 3f27f7612..5b4160503 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index 2cad48bab..fb15e000b 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A <span class=\\"nocase\\">Frame Tracking Model</span> for <span class=\\"nocase\\">Memory-Enhanced Dialogue Systems</span>",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 2d8a292bb..c75e03680 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 8a66388b7..e92f59614 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -142,7 +142,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index b451fed2d..f1f28dea3 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -139,7 +139,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.after.biblatex.snap
index 00e4b44c7..a20a38d54 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.after.coll.biblatex.snap
index f1240af98..e938b4ad9 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.before.biblatex.snap
index 4618793af..f1bd9ad60 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.before.coll.biblatex.snap
index 7b8fccfa6..cc3692cf7 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap
index bbfc485b7..48f134f56 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index 0f367ba6b..b37792835 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 53f1d6332..ffe75022a 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -127,7 +127,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -197,7 +197,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 9c2dc35b7..40825b416 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index 25e9df5b8..573f07cfe 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -185,7 +185,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 3f27f7612..5b4160503 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index 2cad48bab..fb15e000b 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A <span class=\\"nocase\\">Frame Tracking Model</span> for <span class=\\"nocase\\">Memory-Enhanced Dialogue Systems</span>",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 2d8a292bb..c75e03680 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 8a66388b7..e92f59614 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -142,7 +142,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index b451fed2d..f1f28dea3 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -139,7 +139,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap
index 00e4b44c7..a20a38d54 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap
index f1240af98..e938b4ad9 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -125,7 +125,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap
index 4618793af..f1bd9ad60 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap
index 7b8fccfa6..cc3692cf7 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -121,7 +121,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -188,7 +188,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap
index bbfc485b7..48f134f56 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=off^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index c9322e1e3..335212e3a 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 2416f801d..f57cb7a72 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 0905106c3..855946dfa 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index f97ed33e3..78ffe3813 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index c02de0ccc..ec2ceef8b 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index b70f06688..1d683f8e2 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A Frame Tracking Model for Memory-Enhanced Dialogue Systems",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 9d58f1d7f..2fe8d3887 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index 10e762c79..ceeb6868a 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.after.biblatex.snap
index de38254fd..2a2ad16bb 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap
index d09200638..e118dc232 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.before.biblatex.snap
index 5293627c8..55cd115f8 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap
index 483b46b87..e048a7fdd 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index c9322e1e3..335212e3a 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 2416f801d..f57cb7a72 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 0905106c3..855946dfa 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index f97ed33e3..78ffe3813 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index c02de0ccc..ec2ceef8b 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index b70f06688..1d683f8e2 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A Frame Tracking Model for Memory-Enhanced Dialogue Systems",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 9d58f1d7f..2fe8d3887 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index 10e762c79..ceeb6868a 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap
index de38254fd..2a2ad16bb 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap
index d09200638..e118dc232 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap
index 5293627c8..55cd115f8 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap
index 483b46b87..e048a7fdd 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index b921584fd..ada0ea676 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 8d5843ac3..e13ae0b18 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 081400bb0..33beaaf90 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index 8db7ddd23..5b752a6b1 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 9d8a44677..9d1b58a7a 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index e67b7704d..5948d51e7 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A frame tracking model for memory-enhanced dialogue systems",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 61ddc26c6..cdf73242b 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index fc36581f2..84aea2640 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.after.biblatex.snap
index 1076855a7..5543a3d94 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.after.coll.biblatex.snap
index 8fb0f460a..01342fd6d 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.before.biblatex.snap
index 05291fd11..ebd82cafb 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.before.coll.biblatex.snap
index b8f708ccb..dc6163f42 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index b921584fd..ada0ea676 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 8d5843ac3..e13ae0b18 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 081400bb0..33beaaf90 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index 8db7ddd23..5b752a6b1 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 9d8a44677..9d1b58a7a 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index e67b7704d..5948d51e7 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A frame tracking model for memory-enhanced dialogue systems",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 61ddc26c6..cdf73242b 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index fc36581f2..84aea2640 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap
index 1076855a7..5543a3d94 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap
index 8fb0f460a..01342fd6d 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap
index 05291fd11..ebd82cafb 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap
index b8f708ccb..dc6163f42 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index d64cca589..a1c3142ab 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 8f79625d1..8a43b16ef 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 3813b62d1..d8ed99599 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index db68718a3..1c4273334 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 4832b9dd5..c83c6eabf 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index 2cad48bab..fb15e000b 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A <span class=\\"nocase\\">Frame Tracking Model</span> for <span class=\\"nocase\\">Memory-Enhanced Dialogue Systems</span>",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 2d8a292bb..c75e03680 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 011a5ecb7..d538c7d35 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index ccfaa120b..3398b76f2 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.after.biblatex.snap
index 704135550..b1488da18 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.after.coll.biblatex.snap
index 91d8105a8..684245f46 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.before.biblatex.snap
index e7e45641e..c6456b859 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.before.coll.biblatex.snap
index 3414ad5fa..ce786ccfb 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index d64cca589..a1c3142ab 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 8f79625d1..8a43b16ef 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 3813b62d1..d8ed99599 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index db68718a3..1c4273334 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 4832b9dd5..c83c6eabf 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index 2cad48bab..fb15e000b 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A <span class=\\"nocase\\">Frame Tracking Model</span> for <span class=\\"nocase\\">Memory-Enhanced Dialogue Systems</span>",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 2d8a292bb..c75e03680 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 011a5ecb7..d538c7d35 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index ccfaa120b..3398b76f2 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap
index 704135550..b1488da18 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap
index 91d8105a8..684245f46 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap
index e7e45641e..c6456b859 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap
index 3414ad5fa..ce786ccfb 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap
index b286e45a2..838ad72ed 100644
--- a/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on+guess^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index c9322e1e3..335212e3a 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 2416f801d..f57cb7a72 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 0905106c3..855946dfa 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index f97ed33e3..78ffe3813 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index c02de0ccc..ec2ceef8b 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index b70f06688..1d683f8e2 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A Frame Tracking Model for Memory-Enhanced Dialogue Systems",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 9d58f1d7f..2fe8d3887 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index 10e762c79..ceeb6868a 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.after.biblatex.snap
index de38254fd..2a2ad16bb 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap
index d09200638..e118dc232 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.before.biblatex.snap
index 5293627c8..55cd115f8 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap
index 483b46b87..e048a7fdd 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap
index a0f4652c2..5696244a0 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index c9322e1e3..335212e3a 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 2416f801d..f57cb7a72 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 0905106c3..855946dfa 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index f97ed33e3..78ffe3813 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index c02de0ccc..ec2ceef8b 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index b70f06688..1d683f8e2 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A Frame Tracking Model for Memory-Enhanced Dialogue Systems",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 9d58f1d7f..2fe8d3887 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index 10e762c79..ceeb6868a 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap
index de38254fd..2a2ad16bb 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap
index d09200638..e118dc232 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap
index 5293627c8..55cd115f8 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap
index 483b46b87..e048a7fdd 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap
index a0f4652c2..5696244a0 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=as-needed^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index b921584fd..ada0ea676 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 8d5843ac3..e13ae0b18 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 081400bb0..33beaaf90 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index 8db7ddd23..5b752a6b1 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 9d8a44677..9d1b58a7a 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index e67b7704d..5948d51e7 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A frame tracking model for memory-enhanced dialogue systems",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 61ddc26c6..cdf73242b 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index fc36581f2..84aea2640 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.after.biblatex.snap
index 1076855a7..5543a3d94 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.after.coll.biblatex.snap
index 8fb0f460a..01342fd6d 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.before.biblatex.snap
index 05291fd11..ebd82cafb 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.before.coll.biblatex.snap
index b8f708ccb..dc6163f42 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap
index a0f4652c2..5696244a0 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index b921584fd..ada0ea676 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 8d5843ac3..e13ae0b18 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 081400bb0..33beaaf90 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index 8db7ddd23..5b752a6b1 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 9d8a44677..9d1b58a7a 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index e67b7704d..5948d51e7 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A frame tracking model for memory-enhanced dialogue systems",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 1c2fc6350..468d77d07 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 61ddc26c6..cdf73242b 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index fc36581f2..84aea2640 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap
index 1076855a7..5543a3d94 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap
index 8fb0f460a..01342fd6d 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap
index 05291fd11..ebd82cafb 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap
index b8f708ccb..dc6163f42 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap
index a0f4652c2..5696244a0 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=off^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index d64cca589..a1c3142ab 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 8f79625d1..8a43b16ef 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 3813b62d1..d8ed99599 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index db68718a3..1c4273334 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 4832b9dd5..c83c6eabf 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index 2cad48bab..fb15e000b 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A <span class=\\"nocase\\">Frame Tracking Model</span> for <span class=\\"nocase\\">Memory-Enhanced Dialogue Systems</span>",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 2d8a292bb..c75e03680 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 011a5ecb7..d538c7d35 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index ccfaa120b..3398b76f2 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.after.biblatex.snap
index 704135550..b1488da18 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.after.coll.biblatex.snap
index 91d8105a8..684245f46 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.before.biblatex.snap
index e7e45641e..c6456b859 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.before.coll.biblatex.snap
index 3414ad5fa..ce786ccfb 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap
index a0f4652c2..5696244a0 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap
index d64cca589..a1c3142ab 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/BBT export of square brackets in date #245 -- xref should not be escaped #246.biblatex.snap	
@@ -67,7 +67,7 @@ Object {
           "20",
         ],
         "xref": Array [
-          "welkerₐndreas₁999",
+          "welker_andreas_1999",
         ],
       },
       "key": "bentley_academic_2011",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap
index 8f79625d1..8a43b16ef 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.default.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -128,7 +128,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -199,7 +199,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap
index 3813b62d1..d8ed99599 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.groups3.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap
index db68718a3..1c4273334 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-DOI.biblatex.snap	
@@ -51,7 +51,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -187,7 +187,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap
index 4832b9dd5..c83c6eabf 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Omit URL export when DOI present. #131.prefer-url.biblatex.snap	
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap
index 2cad48bab..fb15e000b 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Treat dash-connected words as a single word for citekey generation #619.biblatex.snap	
@@ -46,7 +46,7 @@ Object {
           "arxiv",
         ],
         "keywords": Array [
-          "ₜabletₘodified",
+          "_tablet_modified",
         ],
         "title": Array [
           "A <span class=\\"nocase\\">Frame Tracking Model</span> for <span class=\\"nocase\\">Memory-Enhanced Dialogue Systems</span>",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap
index 2d8a292bb..c75e03680 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/Unexpected HTML tags abort export #1575.biblatex.snap	
@@ -31,10 +31,10 @@ Object {
           "archives",
           "archivistiq",
           "instrumentation",
-          "knowledge<sub>i</sub>nfrastructures",
-          "knowledgeₚroduction",
-          "pratiqₛci",
-          "researchₘethods",
+          "knowledge_infrastructures",
+          "knowledge_production",
+          "pratiq_sci",
+          "research_methods",
           "tools",
           "zotero",
         ],
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap
index 011a5ecb7..d538c7d35 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.biblatex.snap	
@@ -143,7 +143,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap
index ccfaa120b..3398b76f2 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/arXiv identifiers in BibLaTeX export #460.bibtex.snap	
@@ -140,7 +140,7 @@ Object {
           "Journal of High Energy Physics",
         ],
         "keywords": Array [
-          "ₜablet",
+          "_tablet",
           "Batalin-Vilkoviski formalism",
           "covariant string field theory",
           "futur: 3",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap
index 704135550..b1488da18 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.after.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap
index 91d8105a8..684245f46 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.after.coll.biblatex.snap
@@ -58,7 +58,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -126,7 +126,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap
index e7e45641e..c6456b859 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.before.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap
index 3414ad5fa..ce786ccfb 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/auto-export.before.coll.biblatex.snap
@@ -48,7 +48,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "1–10",
@@ -122,7 +122,7 @@ Object {
         ],
         "keywords": Array [
           "bdec15",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "location": Array [
           "Piscataway, NJ, USA",
@@ -190,7 +190,7 @@ Object {
           "jasmin13a",
           "p-12-iam",
           "p-gmdm41",
-          "zoteroₜestcase",
+          "zotero_testcase",
         ],
         "pages": Array [
           "485–498",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap
index 98aa432d2..2a1e700ac 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/custom fields should be exported as-is #441.bibtex.snap	
@@ -58,7 +58,7 @@ Object {
           "885–898",
         ],
         "related": Array [
-          "key₂",
+          "key_2",
         ],
         "relatedtype": Array [
           "bytranslator",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap
index cb2c8bdf7..d1b7f5c39 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/export/don't escape entry key fields for #296.biblatex.snap	
@@ -25,7 +25,7 @@ Object {
           "Cours de droit administratif",
         ],
         "crossref": Array [
-          "eisenmann<sub>c</sub>ours₁982",
+          "eisenmann_cours_1982",
         ],
         "date": Array [
           "1983",
diff --git a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap
index a0f4652c2..5696244a0 100644
--- a/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
+++ b/test/tap-snapshots/sentencecase=on^caseprotection=strict^preservequoted/import/zbb (quietly) chokes on this .bib #664.bib.snap	
@@ -43,7 +43,7 @@ Object {
           "0147-5967",
         ],
         "jlprojects": Array [
-          "spatialₑlections, continuousₒpinion<sub>d</sub>ynamics",
+          "spatial_elections, continuous_opinion_dynamics",
         ],
         "journal": Array [
           "Journal of Comparative Economics",