Gros Ventre language
| Gros Ventre | |
|---|---|
| 'ɔ'ɔ́ɔ́ɔ́naakíit'ɔ | |
| Native to | United States | 
| Region | Montana | 
| Ethnicity | Gros Ventre | 
| Extinct | 2007, with the death of Theresa Lamebull | 
| Revival | 45 self-identified speakers (2009-2013) | 
| Official status | |
| Official language in | United States (Fort Belknap Indian Community, MT) | 
| Language codes | |
| ISO 639-3 | ats | 
| Glottolog | gros1243 | 
| ELP | Gros Ventre | 
| Historical extent of the language | |
| Gros Ventre is classified as Critically Endangered by the UNESCO Atlas of the World's Languages in Danger | |
Atsina, or Gros Ventre (also known as Aaniiih, Ananin, Ahahnelin, Ahe, A’ani, and ʔɔʔɔɔɔniiih), is the ancestral language of the Gros Ventre people of what is today Montana, United States of America. The last fluent speaker died in 2007, though revitalization efforts are underway.