There is no such thing as a definitive list of languages This is true. But SIL has what is considered the "standard" for this list, and there are almost 7000 o

There is no such thing as a definitive list of languages This is true. But SIL has what is considered the "standard" for this list, and there are almost 7000 of them. Many of them are unwritten. See http://www.ethnologue.com/ http://www.ethnologue.com/ and ISO 639-3.