diff --git a/classes/framework.php b/classes/framework.php
index ee5ab5c534cb9737f5c8f37d7177a5da9dd5aa3b..cff9ce7342b9f4792d5488c473a5c58c4ad67963 100644
--- a/classes/framework.php
+++ b/classes/framework.php
@@ -103,7 +103,7 @@ class framework implements \H5PFrameworkInterface {
         }
 
         // Get current language in Moodle
-        $language = \current_language();
+        $language = str_replace('_', '-', strtolower(\current_language()));
 
         // Try to map
         return isset($map[$language]) ? $map[$language] : $language;