Iñapari language

Inapari is a critically endangered Arawakan language of the Southern Piro group, spoken along the Las Piedras River in Peru by only about four or five people as of 2020, all of them bilingual in Spanish; the language is already extinct in Bolivia. With no younger speakers learning it, UNESCO's Atlas of the World's Languages in Danger classifies Inapari as critically endangered, though a published dictionary preserves its vocabulary and grammar.