PHPTAL PHP Template Attribute Language

<?php
require_once 'PHPTAL.php';
require_once 'PHPTAL/GetTextTranslator.php';

try {
    $tr = new PHPTAL_GetTextTranslator();

    // set language to use for this session (first valid language will
    // be used)
    $tr->setLanguage('en_GB.utf8', 'en_GB');

    // register gettext domain to use
    $tr->addDomain('mydomain', '/path/to/your/translation_root');

    // specify current domain
    $tr->useDomain('mydomain');

    $tpl = new PHPTAL('mytemplate.xhtml');

    // tell PHPTAL to use our translator
    $tpl->setTranslator($tr);

    // output translated template
    echo $tpl->execute();
}
catch (Exception $e){
    echo $e;
}

$tr = $tpl->getTranslator();

$subject = $tr->translate("Registration information");

$tr->setVar("user",$username);
$message = $tr->translate("Dear ${user}, thanks for registering!");

mail($email, $subject, $message);