diff -u b/core/modules/locale/locale.admin.js b/core/modules/locale/locale.admin.js
--- b/core/modules/locale/locale.admin.js
+++ b/core/modules/locale/locale.admin.js
@@ -14,7 +14,7 @@
    *
    * @prop {Drupal~behaviorAttach} attach
    *   Attaches behavior to show the user if translations has changed.
-   * @prop {Drupal~behaviorAttach} detach
+   * @prop {Drupal~behaviorDetach} detach
    *   Detach behavior to show the user if translations has changed.
    */
   Drupal.behaviors.localeTranslateDirty = {