PHPMailer::setLanguage( string $langcode = 'en', string $lang_path = '' ): bool

2490    public static function setLanguage($langcode = 'en', $lang_path = '')2491    {2492        //Backwards compatibility for renamed language codes2493        $renamed_langcodes = [2494            'br' => 'pt_br',2495            'cz' => 'cs',2496            'dk' => 'da',2497            'no' => 'nb',2498            'se' => 'sv',2499            'rs' => 'sr',2500            'tg' => 'tl',2501            'am' => 'hy',2502        ];2503 2504        if (array_key_exists($langcode, $renamed_langcodes)) {2505            $langcode = $renamed_langcodes[$langcode];2506        }2507 2508        //Define full set of translatable strings in English2509        $PHPMAILER_LANG = [2510            'authenticate' => 'SMTP Error: Could not authenticate.',2511            'buggy_php' => 'Your version of PHP is affected by a bug that may result in corrupted messages.' .2512                ' To fix it, switch to sending using SMTP, disable the mail.add_x_header option in' .2513                ' your php.ini, switch to MacOS or Linux, or upgrade your PHP to version 7.0.17+ or 7.1.3+.',2514            'connect_host' => 'SMTP Error: Could not connect to SMTP host.',2515            'data_not_accepted' => 'SMTP Error: data not accepted.',2516            'empty_message' => 'Message body empty',2517            'encoding' => 'Unknown encoding: ',2518            'execute' => 'Could not execute: ',2519            'extension_missing' => 'Extension missing: ',2520            'file_access' => 'Could not access file: ',2521            'file_open' => 'File Error: Could not open file: ',2522            'from_failed' => 'The following From address failed: ',2523            'instantiate' => 'Could not instantiate mail function.',2524            'invalid_address' => 'Invalid address: ',2525            'invalid_header' => 'Invalid header name or value',2526            'invalid_hostentry' => 'Invalid hostentry: ',2527            'invalid_host' => 'Invalid host: ',2528            'mailer_not_supported' => ' mailer is not supported.',2529            'provide_address' => 'You must provide at least one recipient email address.',2530            'recipients_failed' => 'SMTP Error: The following recipients failed: ',2531            'signing' => 'Signing Error: ',2532            'smtp_code' => 'SMTP code: ',2533            'smtp_code_ex' => 'Additional SMTP info: ',2534            'smtp_connect_failed' => 'SMTP connect() failed.',2535            'smtp_detail' => 'Detail: ',2536            'smtp_error' => 'SMTP server error: ',2537            'variable_set' => 'Cannot set or reset variable: ',2538            'no_smtputf8' => 'Server does not support SMTPUTF8 needed to send to Unicode addresses',2539            'imap_recommended' => 'Using simplified address parser is not recommended. ' .2540                'Install the PHP IMAP extension for full RFC822 parsing.',2541            'deprecated_argument' => 'Deprecated Argument: ',2542        ];2543        if (empty($lang_path)) {2544            //Calculate an absolute path so it can work if CWD is not here2545            $lang_path = dirname(__DIR__) . DIRECTORY_SEPARATOR . 'language' . DIRECTORY_SEPARATOR;2546        }2547 2548        //Validate $langcode2549        $foundlang = true;2550        $langcode  = strtolower($langcode);2551        if (2552            !preg_match('/^(?P<lang>[a-z]{2})(?P<script>_[a-z]{4})?(?P<country>_[a-z]{2})?$/', $langcode, $matches)2553            && $langcode !== 'en'2554        ) {2555            $foundlang = false;2556            $langcode = 'en';2557        }2558 2559        //There is no English translation file2560        if ('en' !== $langcode) {2561            $langcodes = [];2562            if (!empty($matches['script']) && !empty($matches['country'])) {2563                $langcodes[] = $matches['lang'] . $matches['script'] . $matches['country'];2564            }2565            if (!empty($matches['country'])) {2566                $langcodes[] = $matches['lang'] . $matches['country'];2567            }2568            if (!empty($matches['script'])) {2569                $langcodes[] = $matches['lang'] . $matches['script'];