PHPMailer::lang( string $key ): string

4279    protected function lang($key)4280    {4281        if (count($this->language) < 1) {4282            $this->setLanguage(); //Set the default language4283        }4284 4285        if (array_key_exists($key, $this->language)) {4286            if ('smtp_connect_failed' === $key) {4287                //Include a link to troubleshooting docs on SMTP connection failure.4288                //This is by far the biggest cause of support questions4289                //but it's usually not PHPMailer's fault.4290                return $this->language[$key] . ' https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting';4291            }4292 4293            return $this->language[$key];4294        }4295 4296        //Return the key as a fallback4297        return $key;4298    }