diff --git a/plugins/box/pages/languages/en.lang.php b/plugins/box/pages/languages/en.lang.php
index a699c54..56f0bf6 100644
--- a/plugins/box/pages/languages/en.lang.php
+++ b/plugins/box/pages/languages/en.lang.php
@@ -16,7 +16,8 @@
             'Title' => 'Title',
             'Name' => 'Name',
             'Author' => 'Author',
-            'Name (slug)' => 'Name (slug)',
+            'Name (slug)' => 'Name (slug)', // check whether in use or not
+            'Slug (url)' => 'Slug (url)',
             'Description' => 'Description',
             'Keywords' => 'Keywords',
             'Parent' => 'Parent',