Statistics of level 2 packages for Arabic in unstable:
Read http://d-i.debian.org/l10n-stats

Outdated:

Translated:
  util-linux/*/debian/po/ar.po 1t [Ossama M. Khayat]
  popularity-contest/*/debian/po/ar.po 4t [Ossama M. Khayat]
  iso-codes/*/iso_3166-1/ar.po 420t [ButterflyOfFire]

Missing files:
  tasksel/tasksel-*/debian/po/ar.po 0u
  tasksel/tasksel-*/tasks/po/ar.po 0u
  tasksel/tasksel-*/po/ar.po 0u
  espeakup/*/debian/po/ar.po 1u
  grub/*/debian/po/ar.po 0u


Global statistics: 425t0f0u (99%)     (total strings: 426=100%)
(From all ar.po files)