Add german translation (#222)

* Added german translation

* Updated languages for test cases

* Updated identical message strings

* Updated django.po with corrected file paths

* Re-generated django.mo file

* Language lists sorted by code for test cases

tests/settings.py

@@ -97,6 +97,7 @@ DATABASE_ROUTERS = ["tests.routers.DatabaseAppsRouter"]
 
 USE_I18N = True
 LANGUAGES = (
+    ("de", "Deutsch"),
     ("en", "English"),
     ("es", "Español"),
     ("fa", "Farsi"),

tests/test_templatetags.py

@@ -22,6 +22,13 @@ class AdminInterfaceTemplateTagsTestCase(TestCase):
         context = Context({"request": self.request_factory.get("/en/admin/")})
         languages = templatetags.get_admin_interface_languages(context)
         expected_languages = [
+            {
+                "code": "de",
+                "name": "Deutsch",
+                "default": False,
+                "active": False,
+                "activation_url": "/i18n/setlang/?next=/de/admin/",
+            },
             {
                 "code": "en",
                 "name": "English",