I'm not sure what component is responsible for this behaviour, so if anyoneknows who should I bug (besides the d-i team) I would appreciate it.
Hello,They are descriptions of task-* packages, e.g. http://packages.debian.org/wheezy/task-laptop, which can be translated in the DDTP (ddtp.debian.net - currently down). It's documented here:
http://anonscm.debian.org/gitweb/?p=tasksel/tasksel.git;a=blob;f=README.translators -- Michał Kułach