Two new packages are part of level3:
xdebconfigurator is aimed at automatic configuration of X Window servers
localization-config is aimed at automatic pre-configuration of localization in several other packages (for instance keyboard settings in X, depending on the locale)
These two packages are (or will be) part of 2nd stage, though they do not input users. The only translatable part is their base-config menu entries.
Both are handled in debian-edu CVS repository.
You can get the two POT files at:
http://people.debian.org/~seppy/d-i/level3/POT/
The translations should be reported as bugs against these two packages.
The i18n.xml file has been updated accordingly (Kostas, you can develop more about localization-config in this file probably).