Speak up! The world's most endangered languages and where to hear them 1: Resígaro, Peru. Sunrise in the Peruvian Amazon (Dreamstime) ... 2: Ainu, Japan. Ainu village in Hokkaido (Dreamstime) ... 3: Dunser, Papua New Guinea. ... 4: Vod, Estonia/Russia. ... 5: Pawnee, USA. ... 6: Chulym, Russia. ... 7: Mudburra, Australia. ... 8: Machaj Juyay, Bolivia. More items... Apr 27, 2018