| English | eng-000 |
| Mortlockese | |
| ISO 639-3 | art-001 | mrl |
| ISO 639-3 Inverted Names | art-291 | Mortlockese |
| Glottolog Languoid Names | art-326 | Mortlockese |
| Glottocode | art-327 | mort1237 |
| Glottolog Primary Key | art-328 | 41354 |
| UNESCO Atlas of the World’s Languages in Danger ID | art-329 | 2341 |
| français | fra-000 | mortlock |
| español | spa-000 | mortlock |