Ersu (4133-ers) = Threatened (100 percent certain, based on the evidence available) (fully proficient speakers are all in their 60s or older; children still learn the language at home. Ersu is essentially used as the primary language of oral communication in family and community events.)
Glottolog
[ers] at ISO 639-3
[ers] at OLAC
[ers] at IMTVault
Ersu at Endangered Languages Project
Ersu at Grambank
Wikipedia
PHOIBLE
Wikidata