Interlingua is a language invented in 1905 b. Ch. and spoken by about 3 people worldwide. Actually, it's near the truth. But two of the speakers are influent in it (okey, they only know how to say 'hello', 'where the hell is my hedgehog?' and to swear). The language aims at becoming the first world language. The only thing that Nostradamus was able to say about hearing that, was "good luck, bi***".
But anyway, Interlingua is cool. If you don't have to be in the hearing distance, of course.