Make text "close all" be able to translate

It would be nice to be able to translate the small text "[ close all ]" below the pmgrowl messages. Stan Lemon (the author of jGrowl, http://www.stanlemon.net) gave me the advice to set:
$.jGrowl.defaults.closerTemplate = '

';

As a work around until this gets fixed I use the following code in my custom_helper.module.

/**
 * Implementation of hook_init().
 */
function tierhalterclub_helper_init() {
  if (user_access('read privatemsg')) {
    // Add required files

    // translate the close all string
    drupal_add_js("$.jGrowl.defaults.closerTemplate = '<div>" . t("close all") . "</div>';", 'inline', 'footer');
  }
}

AFAIK the module weight of the custom module needs to be greater than the pmgrowl module wight. So I set this in my custom_module.install:

/**
 * Implementation of hook_install().
 */
function tierhalterclub_helper_registration_install() {
  // weight auf 200 setzen, damit wir die letzten sind, die etwas machen
  db_query("UPDATE {system} SET weight = 200 WHERE name = 'tierhalterclub_helper'");
}

Note that there's an equivalent to t() for using translateable strings in JS called Drupal.t()
Note also: I'm not sure if the parameter of drupal_add_js in pmgrowl_init are correctly set. Shouldn't the scope 'footer' be the third parameter.