Use different menus for different languages in Drupal 7 template

gistfile1.txt

<?php
  global $language;
  $main_menu = menu_tree_output(menu_tree_all_data('main-menu', NULL, 2));
  $menu_principal = menu_tree_output(menu_tree_all_data('menu-menu-principal-espanol', NULL, 2));
?>

<?php if ($language->language == 'en'): ?>
  <?php print drupal_render($main_menu); ?>
<?php elseif ($language->language == 'es'): ?>
  <?php print drupal_render($menu_principal); ?>
<?php endif; ?>