Apart from Jens remarks, you should send this as a bug report against
tasksel, as described in:
http://d-i.alioth.debian.org/i18n-doc/ch01s04.html#id2543949
and
http://d-i.alioth.debian.org/i18n-doc/ape.html
Damodharan Rajalingam rdamodharan at gmail.com is the Tamil language co-ordinator for Debian Installer,Regards
you might want to discuss the status with him.