| ISO 639-2/T | art-002 | cad |
| ISO 639-2/B | art-003 | cad |
| ISO 639-3 Reference Names | art-289 | Caddo |
| ISO 639-3 Print Names | art-290 | Caddo |
| ISO 639-3 Inverted Names | art-291 | Caddo |
| Ethnologue Primary Language Names | art-323 | Caddo |
| Glottolog Languoid Names | art-326 | Caddo |
| Glottocode | art-327 | cadd1256 |
| Glottolog Primary Key | art-328 | 44719 |
| UNESCO Atlas of the World’s Languages in Danger ID | art-329 | 894 |
| Ethnologue Language Names | art-330 | Caddo |
| Ethnologue Language Names | art-330 | Caddoe |
| Ethnologue Language Names | art-330 | Kado |
| Ethnologue Language Names | art-330 | Kadohadacho |
| Hasí:nay | cad-000 | Hasí:nay |
| 普通话 | cmn-000 | 卡多语 |
| Deutsch | deu-000 | Caddo |
| English | eng-000 | Caddo |
| français | fra-000 | caddo |
| русский | rus-000 | каддо |
| español | spa-000 | caddo |
| español | spa-000 | cado |
