diff --git a/Justfile b/Justfile
index b835cf4..c68c473 100644
--- a/Justfile
+++ b/Justfile
@@ -32,6 +32,8 @@ lint:
     mix format --check-formatted
     mix compile --warnings-as-errors
     mix credo
+    # Check that all German translations are filled (UI must be in German)
+    @bash -c 'for file in priv/gettext/de/LC_MESSAGES/*.po; do awk "/^msgid \"\"$/{header=1; next} /^msgid /{header=0} /^msgstr \"\"$/ && !header{print FILENAME\":\"NR\": \" \$0; exit 1}" "$file" || exit 1; done'
     mix gettext.extract --check-up-to-date
 
 audit:
@@ -116,4 +118,4 @@ init-prod-secrets:
 
 # Start production environment with Docker Compose
 start-prod: init-prod-secrets
-  docker compose -f docker-compose.prod.yml up -d
\ No newline at end of file
+  docker compose -f docker-compose.prod.yml up -d