| español | spa-000 |
| cado | |
| ISO 639-3 | art-001 | cad |
| 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 |
| English | eng-000 | Caddo |
| français | fra-000 | caddo |
| српски | srp-000 | рупа |
| српски | srp-000 | јама |