diff --git a/addons/website/models/ir_http.py b/addons/website/models/ir_http.py
index 1833ce102db..c0a9e209d00 100644
--- a/addons/website/models/ir_http.py
+++ b/addons/website/models/ir_http.py
@@ -91,7 +91,12 @@ class ir_http(orm.AbstractModel):
             assert path is not None
         except Exception:
             return self._handle_exception(werkzeug.exceptions.NotFound())
-        if path != werkzeug.url_quote(request.httprequest.path):
+
+        generated_path = werkzeug.url_unquote_plus(path)
+        current_path = werkzeug.url_unquote_plus(request.httprequest.path)
+        if generated_path != current_path:
+            if request.lang != request.website.default_lang_code:
+                path = '/' + request.lang + path
             return werkzeug.utils.redirect(path)
 
     def _handle_exception(self, exception=None, code=500):