myaac/system/locale/pl/main.php

<?php
/**
 * polish language file
 * main.php
 *
 * @author Slawkens <slawkens@gmail.com>
 */
$locale['name']     = 'Polish';
$locale['lang']		= 'pl-PL';
$locale['encoding'] = 'utf-8';
$locale['direction']= 'ltr';

$locale['error404'] = 'Strona nie została odnaleziona.';
$locale['news'] = 'Ostatnie newsy';
$locale['loaded_in_ms'] = 'w $TIME$ ms';