Afro-Asiatic Languages - A Very Interesting Case

Linguists use the comparative method to reconstruct past forms of language. It's hard to use that past a certain time-depth simply because language changes, he says. The Afro-Asiatic family is proposed to have the deepest depth of time - between 10 and 15,000 years. But Crayalization occurs when languages come together in some kind of even mixture.