He he! I really find the google search homepage in tamil a bit funny :D.
The title of the post is the equivalent of "Sign In" in their english pages. Although literally traslated, it means "Enter" (not the keyboard-key but the antonym of exit). Maybe "Enter in" / "Come in" perhaps, put very literally.
Also turns out they couldn't find some equivalent words in tamil ;)). So here goes some literal suggestions from me (with help from my mom of course).
Desktop - மேஜை மேல் (might sound funny, but if it can be accepted in english, why not in tamil?)
Personalized Home - தனித் தன்மை வாயந்த வீடூ (I still haven't figured a more apt word in place of home :-? ... தளம் perhaps)
Wonder if they thought tamil speaking people wouldn't be using these services. On the contrary I think they'd be sizeable in number.