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
Choosing Natural Adjective Ladders - a survey of language use for game designers who want to use words instead of numbers
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.