RESOURCES: Linguistics and Languages
Links to sites dealing with languages and linguistics (not names) that are useful to gamers.
Cappeller's Digital Sanskrit Lexicon
The Language Construction Kit
The Language of Flowers - So it's not a real language. Sue me.
Omniglot, a Guide to Written Language
UrbanDictionary.com: Define Your World
Books, for those who are serious.
Trask, R. L. Historical Linguistics. Oxford University Press, 1996. I'm sure I cited that wrong, but you'll be able to find it. It's a nicely non-technical textbook on language change, for those of you whose fantasy worlds have an ancient language and want a few recent ones.