diff --git a/developer_manual/app/l10n.rst b/developer_manual/app/l10n.rst
index 9e6e7d2c3..53447a11b 100644
--- a/developer_manual/app/l10n.rst
+++ b/developer_manual/app/l10n.rst
@@ -62,7 +62,7 @@ Strings can then be translated in the following way:
         }
 
         public function getLanguageCode() {
-            return $this->trans->getLanguage();
+            return $this->trans->getLanguageCode();
         }
 
         public sayHello() {