How to get data from callback_data ?

Required Information

• Operating system: ubuntu 17.10
• PHP version: php7.1-fpm
• PHP Telegram Bot version: 0.52
• Using MySQL database: yes
• MySQL version: 5.7
• Update Method: Webhook
• Self-signed certificate: yes

Expected behaviour

In the logs there is an answer, but I dont see him in the bot. And me need save in cookie language code uz or ua.

Extra details

public function execute()
    {
        $lang = Lang::chooseLang();

        $inlineKeyboard = new InlineKeyboard([
            ['text' => 'Украинский', 'callback_data' => 'ua'],
            ['text' => 'Узбекский', 'callback_data' => 'uz'],
        ]);

        $data = [
            'chat_id' => $this->getMessage()->getChat()->getId(),
            'text' => $lang[ 'choose_lang' ],
            'reply_markup' => $inlineKeyboard
        ];
        Request::sendMessage($data); // its working

        $callbackAnswer = [
            'callback_query_id' => $this->getCallbackQuery()->getId(),
            'text'              => $this->getCallbackQuery()->getData(),
            'show_alert'        => true,
            'cache_time'        => 0
        ];

        return Request::answerCallbackQuery($callbackAnswer); // its not working
        // And i still tried  Request::sendMessage($callbackAnswer); // its not working too
    }