src/Captcha.php
public function getJsLink($options = [])
    {
        $query = [];
        if ($this->options->get('multiple', $options)) {
            $query = [
                'onload' => $this->callbackName,
                'render' => 'explicit',
            ];
        }
        $lang = $this->options->get('lang', $options);
        if ($lang) {
            $query['hl'] = $lang;
        }

        return static::CAPTCHA_CLIENT_API . '?' . http_build_query($query, null, '&amp;');
    }
public function getJsLink($options = [])
    {
        $query = [];
        if ($this->options->get('multiple', $options)) {
            $query = [
                'onload' => $this->callbackName,
                'render' => 'explicit',
            ];
        }
        $lang = $this->options->get('lang', $options);
        if ($lang) {
            $query['hl'] = $lang;
        }

        return static::CAPTCHA_CLIENT_API . '?' . http_build_query($query, null, '&amp;');
    }
Create javascript api link with language

@param array $options
@return string