public function filterActingOpts($opts) {
        $opts['channel_id'] = isset($opts['channel_id']) ? $opts['channel_id'] : '';
        $opts['channel_secret_key'] = isset($opts['channel_secret_key']) ? $opts['channel_secret_key'] : '';

        $linepay_locale = 'en';
        $locale = get_locale();
        switch ($locale) {
            case 'ja':
                $linepay_locale = 'ja';
                break;
            case 'th':
                $linepay_locale = 'th';
                break;
            case 'ko_KR':
                $linepay_locale = 'ko';
                break;
            case 'zh_CN':
            case 'zh_HK':
            case 'zh_SG':
                $linepay_locale = 'zh_CN';
                break;
            case 'zh_TW':
                $linepay_locale = 'zh_TW';
                break;
        }

        $opts['allowed_locales'] = ['ja', 'ko', 'en', 'zh_CN', 'zh_TW', 'th'];
        $opts['locale'] = $linepay_locale;
        $opts['allowed_currencies'] = Config\Constants::ALLOWED_CURRENCIES;

        return $opts;
    }