Ticket #8121: 8121-r8137.diff

django/middleware/locale.py

@@ -19 +19 @@
 
     def process_response(self, request, response):
         patch_vary_headers(response, ('Accept-Language',))
-        response['Content-Language'] = translation.get_language()
+        if 'Content-Language' not in response:
+            response['Content-Language'] = translation.get_language()
         translation.deactivate()
         return response