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  foreach (element_children($form) as $element) {

    if (substr($element, 0, 5) == 'mlid:') {

      $mlid = $form[$element]['#item']['mlid'];

      if (i18n_get_object('menu', $mlid)->get_translate_access()) {

        $form[$element]['operations']['translate'] = array(

          '#type' => 'link',

          '#title' => t('translate'),

          '#href' => "admin/structure/menu/item/{$mlid}/translate",

        );

 * Implements hook_init().

 */

function i18n_menu_init() {

  // The only way to override the default preferred menu link for a path is to

  // inject it into the static cache of the function menu_link_get_preferred().

  // The problem with the default implementation is that it does not take the

  // language of a menu link into account. Whe having different menu trees for

  // different menus, this means that the active trail will not work for all but

  // one language.

  // The code below is identical to the mentioned function except the added

  // language condition on the query.

  // TODO: Adding an alter tag to the query would allow to do this with a simple

  // hook_query_alter() implementation.

  $preferred_links = &drupal_static('menu_link_get_preferred');

  $path = $_GET['q'];

  // Look for the correct menu link by building a list of candidate paths,

  // which are ordered by priority (translated hrefs are preferred over

  // untranslated paths). Afterwards, the most relevant path is picked from

  // the menus, ordered by menu preference.

  $item = menu_get_item($path);

  $path_candidates = array();

  // 1. The current item href.

  $path_candidates[$item['href']] = $item['href'];

  // 2. The tab root href of the current item (if any).

  if ($item['tab_parent'] && ($tab_root = menu_get_item($item['tab_root_href']))) {

    $path_candidates[$tab_root['href']] = $tab_root['href'];

  }

  // 3. The current item path (with wildcards).

  $path_candidates[$item['path']] = $item['path'];

  // 4. The tab root path of the current item (if any).

  if (!empty($tab_root)) {

    $path_candidates[$tab_root['path']] = $tab_root['path'];

  }

  // Retrieve a list of menu names, ordered by preference.

  $menu_names = menu_get_active_menu_names();

  // Use an illegal menu name as the key for the preferred menu link.

  $selected_menu = MENU_PREFERRED_LINK;

  // Put the selected menu at the front of the list.

  array_unshift($menu_names, $selected_menu);

  $query = db_select('menu_links', 'ml', array('fetch' => PDO::FETCH_ASSOC));

  $query->leftJoin('menu_router', 'm', 'm.path = ml.router_path');

  $query->fields('ml');

  // Weight must be taken from {menu_links}, not {menu_router}.

  $query->addField('ml', 'weight', 'link_weight');

  $query->fields('m');

  $query->condition('ml.link_path', $path_candidates, 'IN');

  // Only look menu links with none or the current language.

  $query->condition('ml.language', array(LANGUAGE_NONE, i18n_language_interface()->language), 'IN');

  // Sort candidates by link path and menu name.

  $candidates = array();

  foreach ($query->execute() as $candidate) {

    $candidate['weight'] = $candidate['link_weight'];

    $candidates[$candidate['link_path']][$candidate['menu_name']] = $candidate;

    // Add any menus not already in the menu name search list.

    if (!in_array($candidate['menu_name'], $menu_names)) {

      $menu_names[] = $candidate['menu_name'];

    }

  }

  // Store the most specific link for each menu. Also save the most specific

  // link of the most preferred menu in $preferred_link.

  foreach ($path_candidates as $link_path) {

    if (isset($candidates[$link_path])) {

      foreach ($menu_names as $menu_name) {

        if (empty($preferred_links[$path][$menu_name]) && isset($candidates[$link_path][$menu_name])) {

          $candidate_item = $candidates[$link_path][$menu_name];

          $map = explode('/', $path);

          _menu_translate($candidate_item, $map);

          if ($candidate_item['access']) {

            $preferred_links[$path][$menu_name] = $candidate_item;

            if (empty($preferred_links[$path][MENU_PREFERRED_LINK])) {

              // Store the most specific link.

              $preferred_links[$path][MENU_PREFERRED_LINK] = $candidate_item;

            }

          }

        }