[translation] Two untranslatable buttons: "Apply" and "Close"

1/
Description: Ubuntu 13.04
Release: 13.04

2/
xdiagnose:
  Installé : 3.5.1
  Candidat : 3.5.1
 Table de version :
 *** 3.5.1 0
        500 http://th.archive.ubuntu.com/ubuntu/ raring-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     3.5 0
        500 http://th.archive.ubuntu.com/ubuntu/ raring/main amd64 Packages

3/-4/
As you can see on the attached picture, the two buttons "Apply" and "Close" aren't translated (here into French) and aren't translatable in Launchpad.