| English | eng-000 |
| Klamath-Modoc | |
| ISO 639-3 | art-001 | kla |
| ISO 639-3 Inverted Names | art-291 | Klamath-Modoc |
| Glottolog Languoid Names | art-326 | Klamath-Modoc |
| Glottocode | art-327 | klam1254 |
| Glottolog Primary Key | art-328 | 34270 |
| UNESCO Atlas of the World’s Languages in Danger ID | art-329 | 822 |
| français | fra-000 | klamath |
| español | spa-000 | klamath-modoc |
| español | spa-000 | lutuamí-modoco |