| ISO 639-3 | art-001 |
| xuo | |
| ISO 639-3 Reference Names | art-289 | Kuo |
| ISO 639-3 Print Names | art-290 | Kuo |
| ISO 639-3 Inverted Names | art-291 | Kuo |
| Ethnologue Primary Language Names | art-323 | Kuo |
| Glottolog Languoid Names | art-326 | Kuo |
| Glottocode | art-327 | kuoo1238 |
| Glottolog Primary Key | art-328 | 32423 |
| Ethnologue Language Names | art-330 | Ko |
| Ethnologue Language Names | art-330 | Koh |
| Ethnologue Language Names | art-330 | Kuo |
| English | eng-000 | Kuo |