| English | eng-000 |
| Sepa | |
| ISO 639-3 | art-001 | spb |
| ISO 639-3 | art-001 | spe |
| ISO 639-3 Inverted Names | art-291 | Sepa (Indonesia) |
| ISO 639-3 Inverted Names | art-291 | Sepa (Papua New Guinea) |
| Glottolog Languoid Names | art-326 | Sepa (Papua New Guinea) |
| Glottocode | art-327 | sepa1241 |
| Glottolog Primary Key | art-328 | 42353 |
| UNESCO Atlas of the World’s Languages in Danger ID | art-329 | 2702 |
| français | fra-000 | sepa |
| español | spa-000 | sepa |