feat(i18n): offer es/ja/de/fr in the language selector

Now that the German, Spanish, French, and Japanese catalogs are translated, add them to LANGUAGES so users can select them. The profile language ChoiceField picks them up automatically. Stored DB values and serialized API values remain English regardless of the selected language. Updates the offered-languages test accordingly.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: devGregA

dojo/settings/settings.dist.py

@@ -331,12 +331,14 @@ def generate_url(scheme, double_slashes, user, password, host, port, path, param
 # to load the internationalization machinery.
 USE_I18N = env("DD_USE_I18N")
 
-# Languages offered in the UI. Only languages with an audited catalog are listed;
-# es/ja/de/fr are added once their translations land (their .po files are generated
-# for translators). Stored DB values and serialized API values always remain English
-# regardless of the selected language; only displayed text changes.
+# Languages offered in the UI. Stored DB values and serialized API values always
+# remain English regardless of the selected language; only displayed text changes.
 LANGUAGES = [
     ("en", "English"),
+    ("de", "Deutsch"),
+    ("es", "Español"),
+    ("fr", "Français"),
+    ("ja", "日本語"),
     ("pt-br", "Português (Brasil)"),
     ("ru", "Русский"),
 ]

unittests/test_i18n.py

@@ -93,8 +93,11 @@ def test_language_preference_middleware_runs_after_auth(self):
             mw.index("django.contrib.auth.middleware.AuthenticationMiddleware"),
         )
 
-    def test_only_audited_languages_are_offered(self):
-        self.assertEqual({code for code, _name in settings.LANGUAGES}, {"en", "pt-br", "ru"})
+    def test_offered_languages(self):
+        self.assertEqual(
+            {code for code, _name in settings.LANGUAGES},
+            {"en", "de", "es", "fr", "ja", "pt-br", "ru"},
+        )
 
     def test_locale_paths_point_at_dojo_locale(self):
         self.assertTrue(any(str(path).endswith("dojo/locale") for path in settings.LOCALE_PATHS))