Add Catalan translation

src/paperless/settings.py

@@ -542,6 +542,7 @@ LANGUAGES = [
     ("en-us", _("English (US)")),  # needs to be first to act as fallback language
     ("ar-ar", _("Arabic")),
     ("be-by", _("Belarusian")),
+    ("ca-es", _("Catalan")),
     ("cs-cz", _("Czech")),
     ("da-dk", _("Danish")),
     ("de-de", _("German")),