| ISO 639-3 | art-001 |
| spe | |
| ISO 639-3 Reference Names | art-289 | Sepa (Papua New Guinea) |
| ISO 639-3 Print Names | art-290 | Sepa (Papua New Guinea) |
| ISO 639-3 Inverted Names | art-291 | Sepa (Papua New Guinea) |
| Ethnologue Primary Language Names | art-323 | Sepa |
| 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 |
| Ethnologue Language Names | art-330 | Sepa |
| English | eng-000 | Sepa |
| français | fra-000 | sepa |
| español | spa-000 | sepa |