diff --git a/clang/include/clang/Format/Format.h b/clang/include/clang/Format/Format.h
index 37cb3b5cc0673..4fbcc4ef0705b 100644
--- a/clang/include/clang/Format/Format.h
+++ b/clang/include/clang/Format/Format.h
@@ -3034,7 +3034,9 @@ struct FormatStyle {
   bool isJson() const { return Language == LK_Json; }
   bool isJavaScript() const { return Language == LK_JavaScript; }
   bool isVerilog() const { return Language == LK_Verilog; }
-  bool isProto() const { return Language == LK_Proto; }
+  bool isProto() const {
+    return Language == LK_Proto || Language == LK_TextProto;
+  }
 
   /// Language, this format style is targeted at.
   /// \version 3.5
diff --git a/clang/lib/Format/ContinuationIndenter.cpp b/clang/lib/Format/ContinuationIndenter.cpp
index 8fffdccd35c05..b2dfb79dde8a2 100644
--- a/clang/lib/Format/ContinuationIndenter.cpp
+++ b/clang/lib/Format/ContinuationIndenter.cpp
@@ -1227,9 +1227,7 @@ unsigned ContinuationIndenter::getNewLineColumn(const LineState &State) {
     return CurrentState.Indent;
   }
   if ((Current.isOneOf(tok::r_brace, tok::r_square) ||
-       (Current.is(tok::greater) &&
-        (Style.Language == FormatStyle::LK_Proto ||
-         Style.Language == FormatStyle::LK_TextProto))) &&
+       (Current.is(tok::greater) && Style.isProto())) &&
       State.Stack.size() > 1) {
     if (Current.closesBlockOrBlockTypeList(Style))
       return State.Stack[State.Stack.size() - 2].NestedBlockIndent;
@@ -1276,9 +1274,7 @@ unsigned ContinuationIndenter::getNewLineColumn(const LineState &State) {
   if (Current.is(tok::identifier) && Current.Next &&
       (!Style.isVerilog() || Current.Next->is(tok::colon)) &&
       (Current.Next->is(TT_DictLiteral) ||
-       ((Style.Language == FormatStyle::LK_Proto ||
-         Style.Language == FormatStyle::LK_TextProto) &&
-        Current.Next->isOneOf(tok::less, tok::l_brace)))) {
+       (Style.isProto() && Current.Next->isOneOf(tok::less, tok::l_brace)))) {
     return CurrentState.Indent;
   }
   if (NextNonComment->is(TT_ObjCStringLiteral) &&
@@ -1795,9 +1791,7 @@ void ContinuationIndenter::moveStatePastScopeOpener(LineState &State,
                        Current.MatchingParen->Previous &&
                        Current.MatchingParen->Previous->is(tok::comma);
     AvoidBinPacking = EndsInComma || Current.is(TT_DictLiteral) ||
-                      Style.Language == FormatStyle::LK_Proto ||
-                      Style.Language == FormatStyle::LK_TextProto ||
-                      !Style.BinPackArguments ||
+                      Style.isProto() || !Style.BinPackArguments ||
                       (NextNonComment && NextNonComment->isOneOf(
                                              TT_DesignatedInitializerPeriod,
                                              TT_DesignatedInitializerLSquare));
diff --git a/clang/lib/Format/FormatToken.cpp b/clang/lib/Format/FormatToken.cpp
index d994ed0488996..7a2df8c53952f 100644
--- a/clang/lib/Format/FormatToken.cpp
+++ b/clang/lib/Format/FormatToken.cpp
@@ -100,8 +100,7 @@ bool FormatToken::opensBlockOrBlockTypeList(const FormatStyle &Style) const {
          (is(tok::l_brace) &&
           (getBlockKind() == BK_Block || is(TT_DictLiteral) ||
            (!Style.Cpp11BracedListStyle && NestingLevel == 0))) ||
-         (is(tok::less) && (Style.Language == FormatStyle::LK_Proto ||
-                            Style.Language == FormatStyle::LK_TextProto));
+         (is(tok::less) && Style.isProto());
 }
 
 TokenRole::~TokenRole() {}
diff --git a/clang/lib/Format/FormatTokenLexer.cpp b/clang/lib/Format/FormatTokenLexer.cpp
index a90ba4af2da84..71ce52a3f2df3 100644
--- a/clang/lib/Format/FormatTokenLexer.cpp
+++ b/clang/lib/Format/FormatTokenLexer.cpp
@@ -1311,11 +1311,8 @@ void FormatTokenLexer::readRawToken(FormatToken &Tok) {
     }
   }
 
-  if ((Style.isJavaScript() || Style.Language == FormatStyle::LK_Proto ||
-       Style.Language == FormatStyle::LK_TextProto) &&
-      Tok.is(tok::char_constant)) {
+  if ((Style.isJavaScript() || Style.isProto()) && Tok.is(tok::char_constant))
     Tok.Tok.setKind(tok::string_literal);
-  }
 
   if (Tok.is(tok::comment) && isClangFormatOn(Tok.TokenText))
     FormattingDisabled = false;
diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
index 4a684e2dfc4bd..28bfcfb0f40ff 100644
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -227,8 +227,7 @@ class AnnotatingParser {
       }
       if (CurrentToken->isOneOf(tok::r_paren, tok::r_square, tok::r_brace) ||
           (CurrentToken->isOneOf(tok::colon, tok::question) && InExprContext &&
-           !Style.isCSharp() && Style.Language != FormatStyle::LK_Proto &&
-           Style.Language != FormatStyle::LK_TextProto)) {
+           !Style.isCSharp() && !Style.isProto())) {
         return false;
       }
       // If a && or || is found and interpreted as a binary operator, this set
@@ -678,8 +677,7 @@ class AnnotatingParser {
       } else if (CurrentToken->is(tok::r_square) && Parent &&
                  Parent->is(TT_TemplateCloser)) {
         Left->setType(TT_ArraySubscriptLSquare);
-      } else if (Style.Language == FormatStyle::LK_Proto ||
-                 Style.Language == FormatStyle::LK_TextProto) {
+      } else if (Style.isProto()) {
         // Square braces in LK_Proto can either be message field attributes:
         //
         // optional Aaa aaa = 1 [
@@ -906,8 +904,7 @@ class AnnotatingParser {
           Previous = Previous->getPreviousNonComment();
         if ((CurrentToken->is(tok::colon) &&
              (!Contexts.back().ColonIsDictLiteral || !Style.isCpp())) ||
-            Style.Language == FormatStyle::LK_Proto ||
-            Style.Language == FormatStyle::LK_TextProto) {
+            Style.isProto()) {
           OpeningBrace.setType(TT_DictLiteral);
           if (Previous->Tok.getIdentifierInfo() ||
               Previous->is(tok::string_literal)) {
@@ -1049,9 +1046,7 @@ class AnnotatingParser {
           Line.First->startsSequence(tok::kw_export, Keywords.kw_module) ||
           Line.First->startsSequence(tok::kw_export, Keywords.kw_import)) {
         Tok->setType(TT_ModulePartitionColon);
-      } else if (Contexts.back().ColonIsDictLiteral ||
-                 Style.Language == FormatStyle::LK_Proto ||
-                 Style.Language == FormatStyle::LK_TextProto) {
+      } else if (Contexts.back().ColonIsDictLiteral || Style.isProto()) {
         Tok->setType(TT_DictLiteral);
         if (Style.Language == FormatStyle::LK_TextProto) {
           if (FormatToken *Previous = Tok->getPreviousNonComment())
@@ -1290,10 +1285,8 @@ class AnnotatingParser {
         Tok->SpacesRequiredBefore = 1;
       break;
     case tok::kw_operator:
-      if (Style.Language == FormatStyle::LK_TextProto ||
-          Style.Language == FormatStyle::LK_Proto) {
+      if (Style.isProto())
         break;
-      }
       while (CurrentToken &&
              !CurrentToken->isOneOf(tok::l_paren, tok::semi, tok::r_paren)) {
         if (CurrentToken->isOneOf(tok::star, tok::amp))
@@ -2874,9 +2867,7 @@ class ExpressionParser {
         return prec::Conditional;
       if (NextNonComment && Current->is(TT_SelectorName) &&
           (NextNonComment->isOneOf(TT_DictLiteral, TT_JsTypeColon) ||
-           ((Style.Language == FormatStyle::LK_Proto ||
-             Style.Language == FormatStyle::LK_TextProto) &&
-            NextNonComment->is(tok::less)))) {
+           (Style.isProto() && NextNonComment->is(tok::less)))) {
         return prec::Assignment;
       }
       if (Current->is(TT_JsComputedPropertyName))
@@ -3737,7 +3728,7 @@ unsigned TokenAnnotator::splitPenalty(const AnnotatedLine &Line,
     // Prefer breaking call chains (".foo") over empty "{}", "[]" or "()".
     if (Left.opensScope() && Right.closesScope())
       return 200;
-  } else if (Style.isProto()) {
+  } else if (Style.Language == FormatStyle::LK_Proto) {
     if (Right.is(tok::l_square))
       return 1;
     if (Right.is(tok::period))
@@ -4191,9 +4182,7 @@ bool TokenAnnotator::spaceRequiredBetween(const AnnotatedLine &Line,
   const auto SpaceRequiredForArrayInitializerLSquare =
       [](const FormatToken &LSquareTok, const FormatStyle &Style) {
         return Style.SpacesInContainerLiterals ||
-               ((Style.Language == FormatStyle::LK_Proto ||
-                 Style.Language == FormatStyle::LK_TextProto) &&
-                !Style.Cpp11BracedListStyle &&
+               (Style.isProto() && !Style.Cpp11BracedListStyle &&
                 LSquareTok.endsSequence(tok::l_square, tok::colon,
                                         TT_SelectorName));
       };
@@ -4459,8 +4448,7 @@ bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line,
         Right.is(TT_TemplateOpener)) {
       return true;
     }
-  } else if (Style.Language == FormatStyle::LK_Proto ||
-             Style.Language == FormatStyle::LK_TextProto) {
+  } else if (Style.isProto()) {
     if (Right.is(tok::period) &&
         Left.isOneOf(Keywords.kw_optional, Keywords.kw_required,
                      Keywords.kw_repeated, Keywords.kw_extend)) {
@@ -5079,8 +5067,7 @@ bool TokenAnnotator::mustBreakBefore(const AnnotatedLine &Line,
       return true;
   } else if (Style.BreakAdjacentStringLiterals &&
              (Style.isCpp() || Style.isProto() ||
-              Style.Language == FormatStyle::LK_TableGen ||
-              Style.Language == FormatStyle::LK_TextProto)) {
+              Style.Language == FormatStyle::LK_TableGen)) {
     if (Left.isStringLiteral() && Right.isStringLiteral())
       return true;
   }
@@ -5332,9 +5319,8 @@ bool TokenAnnotator::mustBreakBefore(const AnnotatedLine &Line,
   // together.
   //
   // We ensure elsewhere that extensions are always on their own line.
-  if ((Style.Language == FormatStyle::LK_Proto ||
-       Style.Language == FormatStyle::LK_TextProto) &&
-      Right.is(TT_SelectorName) && Right.isNot(tok::r_square) && Right.Next) {
+  if (Style.isProto() && Right.is(TT_SelectorName) &&
+      Right.isNot(tok::r_square) && Right.Next) {
     // Keep `@submessage` together in:
     // @submessage { key: value }
     if (Left.is(tok::at))
@@ -5548,8 +5534,7 @@ bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line,
     return false;
   }
   if (Left.is(tok::colon) && Left.isOneOf(TT_DictLiteral, TT_ObjCMethodExpr)) {
-    if (Style.Language == FormatStyle::LK_Proto ||
-        Style.Language == FormatStyle::LK_TextProto) {
+    if (Style.isProto()) {
       if (!Style.AlwaysBreakBeforeMultilineStrings && Right.isStringLiteral())
         return false;
       // Prevent cases like:
diff --git a/clang/lib/Format/UnwrappedLineParser.cpp b/clang/lib/Format/UnwrappedLineParser.cpp
index 7b4ec25a8938f..a5a4419b98239 100644
--- a/clang/lib/Format/UnwrappedLineParser.cpp
+++ b/clang/lib/Format/UnwrappedLineParser.cpp
@@ -438,7 +438,7 @@ bool UnwrappedLineParser::parseLevel(const FormatToken *OpeningBrace,
       [[fallthrough]];
     }
     case tok::kw_case:
-      if (Style.isProto() || Style.isVerilog() ||
+      if (Style.Language == FormatStyle::LK_Proto || Style.isVerilog() ||
           (Style.isJavaScript() && Line->MustBeDeclaration)) {
         // Proto: there are no switch/case statements
         // Verilog: Case labels don't have this word. We handle case
@@ -1527,7 +1527,7 @@ void UnwrappedLineParser::parseStructuralElement(
     break;
   case tok::kw_case:
     // Proto: there are no switch/case statements.
-    if (Style.isProto()) {
+    if (Style.Language == FormatStyle::LK_Proto) {
       nextToken();
       return;
     }
@@ -2034,7 +2034,7 @@ void UnwrappedLineParser::parseStructuralElement(
       break;
     case tok::kw_case:
       // Proto: there are no switch/case statements.
-      if (Style.isProto()) {
+      if (Style.Language == FormatStyle::LK_Proto) {
         nextToken();
         return;
       }