Complex sentence: The Tehuelche originally speak Tehuelche, a Chon language, but later with the Araucanization of Patagonia, many tribes started to speak variants of Mapudungun, actually their own name, Tehuelche, comes from that language.
Split into simpler sentences: The Tehuelche originally spoke Tehuelche, a Chon language, but later, with the Araucanization of Patagonia, many tribes started to speak variants of Mapudungun. Actually, their own name, Tehuelche, comes from that language.