Missing Method in NodesController

You are seeing this error because the action changeLanguage is not defined in controller NodesController

If you want to customize this error message, create app/views/errors/missing_action.thtml.

Fatal: Confirm you have created the NodesController::changeLanguage() in file : app/controllers/nodes_controller.php

<?php
class NodesController extends AppController {
   function changeLanguage() {
   }
}
?>