Statistics of level 3 packages for Spanish in vcs:
Read http://d-i.debian.org/l10n-stats

Outdated:

Translated:
  newt/po/es.po 4t [Alastair McKinstry]
  debconf/debian/po/es.po 17t [Javier Fernández-Sanguino Peña]

Missing files:


Global statistics: 21t0f0u (100%)     (total strings: 21=100%)
(From all es.po files)