diff --git a/site/plugins/admin/lang/es_ES.json b/site/plugins/admin/lang/es_ES.json
index 6567e272..95c8a291 100644
--- a/site/plugins/admin/lang/es_ES.json
+++ b/site/plugins/admin/lang/es_ES.json
@@ -18,6 +18,7 @@
   "admin_themes": "Themes",
   "admin_help": "Help",
   "admin_getting_help": "Getting Help",
+  "admin_message_json_invalid": "Invalid JSON",
   "admin_logout": "Logout",
   "admin_profile": "Profile",
   "admin_view_site": "View Site",