translation_menu.php

<?php
$translation_set = i18n_translation_set_create('menu_link');
// translation array
$mlids = array();
$translation_set->reset_translations();
foreach ($mlids as $lang => $item_name) {
  list($menu_name, $mlid) = explode(':', $item_name);
  $item = menu_link_load($mlid);
  $translation_set->add_item($item, $lang);
}
// @todo: set title
$translation_set->title = '';
$translation_set->save(TRUE);