Translation of standalone latte application

Hi all, I have simple web with now mvc architecture, using only form, mail, latte and tracy from Nette framework. Can you help me with setup of translator? I cant figure it out.

I am going stright forward as documentation says. How to inject language and translation file?

$latte = new \Latte\Engine;
$latte->setTempDirectory('/tmp');
$template = new \Nette\Templating\FileTemplate;
$template->setTranslator(new MyTranslator);
$template->registerFilter($latte);
$template->setFile('mail.latte');
$template->rezervace = $rezervace;
$template->emailTo = EMAIL_TO;
$template->emailFrom = EMAIL_FROM;
$template->serverName = SERVER_NAME;
$mail->setHTMLBody($template);
$mailer = new \Nette\Mail\SendmailMailer;
$mailer->send($mail);

In mail.latte is this sample
<p><strong>{_'Zadané údaje'}:</strong></p>