drupal addthis translatable title attributes

gluecode.module

<?php
/**
 * Implements hook_addthis_markup_alter.
 *
 * @param array $markup
 *   $markup contain an array with the structure of the addthis markup.
 */
function gluecode_addthis_markup_alter(&$markup) {
  // alter markup to add title's that are translatable by Drupal
  if (!empty($markup['twitter'])) {
    $markup['twitter']['#attributes']['title'] = t("Stuur naar Twitter");
  }
  if (!empty($markup['facebook'])) {
    $markup['facebook']['#attributes']['title'] = t("Stuur naar Facebook");
  }
  if (!empty($markup['google_plusone_share'])) {
    $markup['google_plusone_share']['#attributes']['title'] = t("Stuur naar Google Plus");
  }
}