diff --git a/django/middleware/locale.py b/django/middleware/locale.py
index becab282ee..35128f7376 100644
--- a/django/middleware/locale.py
+++ b/django/middleware/locale.py
@@ -34,5 +34,7 @@ class LocaleMiddleware:
 
         app = findapp(view_func.__module__)
 
+        request.LANGUAGE_CODE = lang
+
         translation.activate(app, lang)