Polyglot 3000 can automatically identify the language used in a text, phrase, or (sometimes) even a single word. Just paste or type the text into the provided field, or load a text file, and the program will identify it from a database of over 400 languages that it can recognize. The longer the text sample, the better are the odds of proper identification. Worked well with the languages we tested.

http://www.polyglot3000.com/