diff --git a/Dockerfile b/Dockerfile
index dbc421f9..7c553a37 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # default are English and German
-ARG SPELLCHECK_LANGS="en,de"
+ARG SPELLCHECK_LANGS="en,de,es"
 
 # Builder stage: configure env vars, labels, add plain files, install common packages
 FROM python:3.10.2-slim as spellcheck-builder
diff --git a/README.md b/README.md
index 2eb30a45..be29adc4 100644
--- a/README.md
+++ b/README.md
@@ -286,6 +286,7 @@ Currently only the following languages are supported via [GNU Aspell][aspell]:
   - German (`de_DE`),
   - Swiss (`de_CH`)
   - Austrian (`de_AT`)
+- Spanish via the [`aspell-se` Debian package][aspell-es]
 
 Additional languages can be added by request, please open an issue.
 
@@ -576,6 +577,7 @@ This repository is licensed under the MIT license.
 [aspell]: http://aspell.net/
 [aspell-de]: https://packages.debian.org/buster/aspell-de
 [aspell-en]: https://packages.debian.org/buster/aspell-en
+[aspell-es]: https://packages.debian.org/buster/aspell-es
 [GHAMKDBADGE]: https://github.com/rojopolis/spellcheck-github-actions/workflows/Markdownlint%20Action/badge.svg
 [GHASPLLBADGE]: https://github.com/rojopolis/spellcheck-github-actions/workflows/Spellcheck%20Action/badge.svg
 [expect_match]: https://facelessuser.github.io/pyspelling/configuration/#expect-match