Northern Altai (3869-atv) = Endangered (80 percent certain, based on the evidence available) (The transmission of the language to children is definitely becoming rare, but it has probably not yet completely ceased; there may be tribal or local differences.)
Glottolog
[atv] at ISO 639-3
[atv] at OLAC
[atv] at IMTVault
Northern Altai at Endangered Languages Project
Wikipedia
PHOIBLE
Wikidata