Fixed #32479 -- Added fallbacks to subsequent language codes in translations.

Thanks Claude Paroz and Nick Pope for reviews.

1 files changed, 20 insertions, 0 deletions

diff --git a/tests/i18n/tests.py b/tests/i18n/tests.py
index 8248122a97..7d81f2a07d 100644
--- a/tests/i18n/tests.py
+++ b/tests/i18n/tests.py
@@ -1424,6 +1424,26 @@ class MiscTests(SimpleTestCase):
         r.META = {'HTTP_ACCEPT_LANGUAGE': 'zh-my,en'}
         self.assertEqual(get_language_from_request(r), 'zh-hans')
 
+    def test_subsequent_code_fallback_language(self):
+        """
+        Subsequent language codes should be used when the language code is not
+        supported.
+        """
+        tests = [
+            ('zh-Hans-CN', 'zh-hans'),
+            ('zh-hans-mo', 'zh-hans'),
+            ('zh-hans-HK', 'zh-hans'),
+            ('zh-Hant-HK', 'zh-hant'),
+            ('zh-hant-tw', 'zh-hant'),
+            ('zh-hant-SG', 'zh-hant'),
+        ]
+        r = self.rf.get('/')
+        r.COOKIES = {}
+        for value, expected in tests:
+            with self.subTest(value=value):
+                r.META = {'HTTP_ACCEPT_LANGUAGE': f'{value},en'}
+                self.assertEqual(get_language_from_request(r), expected)
+
     def test_parse_language_cookie(self):
         """
         Now test that we parse language preferences stored in a cookie correctly.