| ISO 639-3 | art-001 |
| opk | |
| ISO 639-3 Reference Names | art-289 | Kopkaka |
| ISO 639-3 Print Names | art-290 | Kopkaka |
| ISO 639-3 Inverted Names | art-291 | Kopkaka |
| Ethnologue Primary Language Names | art-323 | Kopkaka |
| Glottolog Languoid Names | art-326 | Kopkaka |
| Glottocode | art-327 | kopk1238 |
| Glottolog Primary Key | art-328 | 43260 |
| Ethnologue Language Names | art-330 | Kopka |
| Ethnologue Language Names | art-330 | Kopkaka |
| Ethnologue Language Names | art-330 | Marub |
| Ethnologue Language Names | art-330 | Tokuni |
| English | eng-000 | Kopkaka |