test(i18n): Align test translations with .po files

- Updates the  dictionary in  to match the ground truth in the  and   files.
- Corrects capitalization for the 'user' translation to ensure tests pass.

Author: mahdirahimi1999

tests/test_locale_messages.py

@@ -366,7 +366,7 @@ class TestTranslations(SimpleTestCase):
             "fa_IR": "کاربر",
             "ar": "مستخدم",
             "de": "Benutzer",
-            "fr": "Utilisateur",
+            "fr": "utilisateur",
             "tr": "kullanıcı",
             "cs": "uživatel",
             "es": "usuario",