Statistics of level 1 packages for Arabic in unstable:
Read http://d-i.debian.org/l10n-stats

Outdated:

Translated:
  zipl-installer/*/debian/po/ar.po 1t [Ossama M. Khayat]
  user-setup/*/debian/po/ar.po 30t [Der Marschall]
  tzsetup/*/debian/po/ar.po 127t [Amr Walryh]
  s390-netdevice/*/debian/po/ar.po 29t [ButterflyOfFire]
  s390-dasd/*/debian/po/ar.po 16t [Fahim Sabah]
  rescue/*/debian/po/ar.po 41t [Fahim Sabah]
  preseed/*/debian/po/ar.po 15t [Fahim Sabah]
  pkgsel/*/debian/po/ar.po 13t [Muhammad Bahaa]
  partman-iscsi/*/debian/po/ar.po 24t [Fahim Sabah]
  partman-xfs/*/debian/po/ar.po 2t [Ossama M. Khayat]
  partman-target/*/debian/po/ar.po 25t [Fahim Sabah]
  partman-partitioning/*/debian/po/ar.po 60t [Der Marschall]
  partman-nbd/*/debian/po/ar.po 19t [Fahim Sabah]
  partman-md/*/debian/po/ar.po 58t [ButterflyOfFire]
  partman-lvm/*/debian/po/ar.po 112t [Amr Walryh]
  partman-jfs/*/debian/po/ar.po 2t [Ossama M. Khayat]
  partman-ext3/*/debian/po/ar.po 14t [Ossama Khayat]
  partman-efi/*/debian/po/ar.po 10t [Fahim Sabah]
  partman-crypto/*/debian/po/ar.po 119t [Amr Walryh]
  partman-btrfs/*/debian/po/ar.po 8t [ButterflyOfFire]
  partman-basicmethods/*/debian/po/ar.po 13t [Ossama M. Khayat]
  partman-basicfilesystems/*/debian/po/ar.po 84t [Maytham]
  partman-base/*/debian/po/ar.po 66t [Bashir Hassan]
  partman-auto-raid/*/debian/po/ar.po 5t [Yaron Shahrabani]
  partman-auto-lvm/*/debian/po/ar.po 30t [Der Marschall]
  partman-auto-crypto/*/debian/po/ar.po 1t [Ossama Khayat]
  partman-auto/*/debian/po/ar.po 32t [Maytham]
  nobootloader/*/debian/po/ar.po 15t [Fahim Sabah]
  network-console/*/debian/po/ar.po 24t [Yaron Shahrabani]
  netcfg/*/debian/po/ar.po 123t [Fahim Sabah]
  net-retriever/*/debian/po/ar.po 6t [Ossama M. Khayat]
  media-retriever/*/debian/po/ar.po 13t [Ossama M. Khayat]
  mdcfg/*/debian/po/ar.po 43t [Ossama M. Khayat]
  main-menu/*/debian/po/ar.po 6t [zer0-x]
  lvmcfg/*/debian/po/ar.po 80t [Fahim Sabah]
  localechooser/*/debian/po/ar.po 45t [Amr Walryh]
  iso-scan/*/debian/po/ar.po 31t [Fahim Sabah]
  installation-report/*/debian/po/ar.po 20t [Ahmed Saleh]
  hw-detect/*/debian/po/ar.po 43t [Ahmed Saleh]
  grub-installer/*/debian/po/ar.po 53t [Muhammad Bahaa]
  flash-kernel/*/debian/po/ar.po 6t [Ossama M. Khayat]
  finish-install/*/debian/po/ar.po 10t [Bashir Hassan]
  debian-installer-utils/*/debian/po/ar.po 14t [zer0-x]
  console-setup/*/debian/po/ar.po 180t [Amr Walryh]
  clock-setup/*/debian/po/ar.po 15t [Fahim Sabah]
  choose-mirror/*/debian/po/ar.po 40t [ButterflyOfFire]
  cdrom-retriever/*/debian/po/ar.po 3t [Fahim Sabah]
  cdrom-detect/*/debian/po/ar.po 29t [Fahim Sabah]
  cdrom-checker/*/debian/po/ar.po 20t [Fahim Sabah]
  cdebconf-terminal/*/debian/po/ar.po 2t [Ossama M. Khayat]
  cdebconf-entropy/*/debian/po/ar.po 5t [ButterflyOfFire]
  cdebconf/*/debian/po/ar.po 44t [ButterflyOfFire]
  base-installer/*/debian/po/ar.po 94t [Fahim Sabah]
  apt-setup/*/debian/po/ar.po 65t [Amr Walryh]
  anna/*/debian/po/ar.po 13t [Bashir Hassan]

Missing files:


Global statistics: 1998t0f0u (100%)     (total strings: 1998=100%)
(From all ar.po files)