Simgle lang switch PHP

.htaccess
-----
RewriteEngine on
RewriteRule ^([a-z]{2}(-[A-Z]{2})?)/(.*) $3?lang=$1 [L,QSA]


index.php
-----
<?php

$txt = null;

if(isset($_GET['lang'])){
  switch ($_GET['lang']) {
    case 'en':
      $txt = include('en.php')
      break;
    default:
      $txt = include('cz.php')
      break;
  }
}


Někde na webu
-----
<?= $txt['title'] ?>


en.php
-----
<?php
return array(
  'title' => 'Some title'
);


cz.php
-----
<?php
return array(
  'title' => 'Nějaký nadpis'
);