Sistema de idiomas

<?php
session_start();
$lang = array('en','es');
foreach($lang as $lang1):
    if(@$_GET['lang'] == $lang1):
        $_SESSION['lang'] = $_GET['lang'];
    endif;
endforeach;
if($_SESSION['lang'] == 'es'):
	require('es.php');
elseif($_SESSION['lang'] == 'en'):
	require('en.php');
else:
	require('es.php');
endif;
?>
<a href="?lang=es">Castellano</a> | <a href="?lang=en">English</a>
Hola yo soy <?php echo $lang['language']; ?> y he seleccionado el idioma <?php echo $lang['name']; ?>

<?php
$lang = array(
    'language' => 'Castellano',
    'name' => 'Juan',
);
?>

<?php
$lang = array(
    'language' => 'English',
    'name' => 'Peter',
);
?>