diff --git a/calsocial/__init__.py b/calsocial/__init__.py
index f2085bd..912b3db 100644
--- a/calsocial/__init__.py
+++ b/calsocial/__init__.py
@@ -38,7 +38,7 @@ def get_locale():
     Selects the best locale based on values sent by the browser.
     """
 
-    supported_languages = ['en', 'hu']
+    supported_languages = ['en', 'hu', 'pl']
 
     if 'l' in request.args and request.args['l'].lower() in supported_languages:
         return request.args['l'].lower()