Yauyos Quechua (5312-qux) = Critically Endangered (100 percent certain, based on the evidence available) (I estimate that there are about twenty teens who understand the Viñac and San Pedro dialects, as well as many as 80 adults in their forties and fifties who can still speak it relatively fluently. Moreover, although its use is now generally restricted to the discussion of every-day and ritual activities, it is still used frequently among the oldest speakers.)
Glottolog
[qux] at ISO 639-3
[qux] at OLAC
[qux] at IMTVault
Yauyos Quechua at Endangered Languages Project
Wikipedia
Wikidata