$output.='<p>'.t('The Migrate Drupal Multilingual module is a requirement for migrating translations. It does not provide a user interface. For more information, see the <a href=":migrate_drupal_multilingual">online documentation for the Migrate Drupal Multilingual module</a>.',[':migrate_drupal_multilingual'=>'https://www.drupal.org/node/2959712']).'</p>';