| ISO 639-3 | art-001 |
| twa | |
| ISO 639-3 Reference Names | art-289 | Twana |
| ISO 639-3 Print Names | art-290 | Twana |
| ISO 639-3 Inverted Names | art-291 | Twana |
| Ethnologue Primary Language Names | art-323 | Twana |
| Glottolog Languoid Names | art-326 | Twana |
| Glottocode | art-327 | twan1247 |
| Glottolog Primary Key | art-328 | 24528 |
| UNESCO Atlas of the World’s Languages in Danger ID | art-329 | 794 |
| Ethnologue Language Names | art-330 | Quilcene |
| Ethnologue Language Names | art-330 | Skokomish |
| Ethnologue Language Names | art-330 | Twana |
| English | eng-000 | Twana |
| français | fra-000 | twana |
| español | spa-000 | tuana |