| name | Ethnologue status | language family | office | IETF | alphabet | ISO 6391 | ISO 6392 | ISO 6393 | speakers (people) | Manuscript | micronation | publisher | former country | is a dialect |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Assiniboine language | 8a Moribund | Siouan languages | asb | 250 | Yes | |||||||||
| Crow language | 6b Threatened | Siouan languages | cro | Latin script | cro | 3,000 | Yes | |||||||
| Dakota language | 7 Shifting | Siouan languages | Latin script | dak | dak | 20,000 | Yes | |||||||
| Hidatsa language | 7 Shifting | Siouan languages | hid | Latin script | hid | 200 | Yes | |||||||
| Lakota language | 8a Moribund | Siouan languages | Latin script | lkt | 6,000 | Yes |