Enabled the Danish (da-dk) translations

src/paperless/settings.py

@@ -302,6 +302,7 @@ LANGUAGE_CODE = 'en-us'
 
 LANGUAGES = [
     ("en-us", _("English (US)")), # needs to be first to act as fallback language
+    ("da-dk", _("Danish")),
     ("de-de", _("German")),
     ("en-gb", _("English (GB)")),
     ("es-es", _("Spanish")),