public function handle(GetOptionsEvent $event)
    {
        if (!$this->wantToHandle($event)) {
            return;
        }

        $event->setOptions(array_flip(array_filter(array_flip(System::getLanguages()), function ($langCode) {
            // Disable >2 char long language codes for the moment.
            return (strlen($langCode) == 2);
        })));
    }