commit 41b651278f1841802c7a31ddeeb982e7696e9e61
Author: Erik Stielstra <info@erikstielstra.nl>
Date:   Mon Jun 24 23:15:36 2013 +0100

    #41

diff --git a/core/modules/locale/locale.module b/core/modules/locale/locale.module
index 0c6ecb6..85d2af6 100644
--- a/core/modules/locale/locale.module
+++ b/core/modules/locale/locale.module
@@ -424,10 +424,15 @@ function locale_themes_disabled($themes) {
 
 /**
  * Implements hook_cron().
+ *
+ * @see drupal_cron_run()
+ * @see locale_queue_info()
  */
 function locale_cron() {
   // Update translations only when an update frequency was set by the admin
   // and a translatable language was set.
+  // Update tasks are added to the queue here but processed by Drupal's cron
+  // using the cron worker defined in locale_queue_info().
   if ($frequency = config('locale.settings')->get('translation.update_interval_days') && locale_translatable_language_list()) {
     module_load_include('translation.inc', 'locale');
     locale_cron_fill_queue();