Windows 7 in தமிழ்

I tried switching my Windows 7 OS to display the content in Thamizh. As part of it, I need to download and install the Language Pack for Thamizh. I managed to download and install and it all worked with the 90% of the menu and Window contents started showing in Thamizh equivalent. I was intrigued by the left out translation part in the Download page. I don't know if it is a bug or left intentionally to help a non-thamizh reader on what is going on