Ticket #4389: get_language_bidi.diff

django/utils/translation/trans_real.py

@@ -244 +244 @@
     True = right-to-left layout
     """
     from django.conf import settings
-    return get_language() in settings.LANGUAGES_BIDI
+    base_lang = lambda x: x.split('-', 1)[0]
+    return base_lang(get_language()) in settings.LANGUAGES_BIDI
 
 def catalog():
     """