I have just come across this site www.googlelanguages.com. It has different search boxes in different languages to search in... If this site is not part of Google how are they able to use the Google name in the domain? Isn't that copyright infringement?
a simple whois googlelanguages.com will show you instant replies to such questions in your case = NO google site ! google registers all its sites in own true name as far as I have seen so far
google don't usually use .com for just a tool.. besides they have language tool: http://www.google.com/language_tools