I'm not sure what you are referring to here. A single tarball containing .po files currently exists for each supported language; are you referring to splitting each tarball up further?
http://mirror2.quickbuild.pearsoncomputing.net/trinity/releases/3.5.12/kde-i...
This is the only tarball that I can see in the website but I think it would be better to distribute every i18n tarball separately as packagers are preparing separate i18n packages for their distro.
Or I can't find the separate tarballs :)
OK, I see what you mean now. The separate tarballs are only available in SVN (see here http://websvn.kde.org/branches/trinity/kde-i18n/); for future releases they should be available separately as they are in SVN.
Thanks for bringing this to my attention!
Tim