How to translate @action in Approve/Disapprove Form

I am stuck with translation of user relationships module in one place: When you want to approve or disapprove/cancel a relationship, you are taken to the form to be seen in the attached screenshot. When I looked into Localization for this form, I found: "Are you sure you want to @action the request to create a %relationship_name relationship to !name?"

Now the problem is in the @action. It has the possible values approve, disapprove, cancel, that are not translatable. I tried to find out where the variable $action comes from, and the only thing i coud find (searching for "approve" "disapprove") was in user_relationships_hooks.inc on line 220:

if (in_array(arg(4), array('approve', 'disapprove', 'cancel'))) {
        $items[] = array(
          'path'                => "user/{$id}/relationships/requested",
          'title'               => t('Approve Relationship'),
          'access'              => $access || ($id == $user->uid),
          'type'                => MENU_CALLBACK,
          'callback'            => 'drupal_get_form', 
          'callback arguments'  => array('user_relationships_pending_requested', arg(4), $id, arg(5)),
        );
      }

With my noob programmer mind I tried to wrap t() functions around the values of the array in the if statement in the first line. But this does no work, obviously it breaks a menu callback or something.

Maybe this is the wrong place to look, but I'd just like to be able to translate the words approve, disapprove and cancel, because otherwise it is very hard to understand for users who don't speak English.