What's a Two Tone Language?

The more distinctive tones you have, the sort of wider the tone space in someone's speech. One good example of a two tone language is Navajo or Apache. We don't want to get to hung up on just one feature of the phonology. There are a bunch of documents that you get on the website where taiyan exists and we're mostly going to be working from the effective grammar,. But there are a lot of other things I'd expect to talk about as well.