diff --git a/src/sentry/conf/locale.py b/src/sentry/conf/locale.py
index 9906210fdd13d2..2573eb5f510869 100644
--- a/src/sentry/conf/locale.py
+++ b/src/sentry/conf/locale.py
@@ -3,6 +3,15 @@
 import sentry
 
 
+# change locale file dir name to locale code
+def dirname_to_local(dir_name):
+    if '_' in dir_name:
+        pre, post = dir_name.split('_', 1)
+        dir_name = '{}-{}'.format(pre, post.lower())
+    return dir_name
+
+
 with open(os.path.join(os.path.dirname(sentry.__file__),
                        'locale', 'catalogs.json'), 'r') as f:
     CATALOGS = json.load(f)['supported_locales']
+    CATALOGS = [dirname_to_local(dirname) for dirname in CATALOGS]