diff --git a/doc/plugins/po.mdwn b/doc/plugins/po.mdwn
index a662c89b0..98526a55a 100644
--- a/doc/plugins/po.mdwn
+++ b/doc/plugins/po.mdwn
@@ -55,7 +55,7 @@ Supported languages
 languages, such as:
 
         po_slave_languages => { 'fr' => 'Français',
-                                'es' => 'Castellano',
+                                'es' => 'Español',
                                 'de' => 'Deutsch',
         }