Simpletest is completely failed when you install a localized Drupal

Reproduction:
- Download a Drupal core translation from the http://localize.drupal.org and copy it to profiles/minimal/translations directory. In my case, this is the Hungarian translation.
- Install a new Drupal 7 site with the minimal profile, and in the second step, set the language to the downloaded language.
- If the site is installed, enable the core Testing module
- Go to Config / Devel / Testing, and run any test.
- The batch process is starting, and you will see the error (mixed language): Egy AJAX HTTP hiba következett be. HTTP eredménykód: 200 A nyomkövetési információk következnek. Útvonal: /batch?id=3&op=do Állapotüzenet: OK Válaszüzenet: Additional uncaught exception thrown while handling exception.OriginalPDOException: SQLSTATE[42S02]: Base table or view not found: 1146 Table 'dbkez.simpletest497071semaphore' doesn't exist: SELECT expire, value FROM {semaphore} WHERE name = :name; Array ( [:name] => locale_cache_hu ) in lock_may_be_available() (line 165 of /var/www/drupal7/includes/lock.inc).AdditionalPDOException: SQLSTATE[42S02]: Base table or view not found:.....