| ISO 639-3 | art-001 |
| ton | |
| ISO 639-2/T | art-002 | ton |
| ISO 639-2/B | art-003 | ton |
| ISO 639-1 | art-004 | to |
| ISO 639-3 Reference Names | art-289 | Tonga (Tonga Islands) |
| ISO 639-3 Print Names | art-290 | Tonga (Tonga Islands) |
| ISO 639-3 Inverted Names | art-291 | Tonga (Tonga Islands) |
| Ethnologue Primary Language Names | art-323 | Tongan |
| Glottolog Languoid Names | art-326 | Tonga (Tonga Islands) |
| Glottocode | art-327 | tong1325 |
| Glottolog Primary Key | art-328 | 41312 |
| Ethnologue Language Names | art-330 | Tonga |
| Ethnologue Language Names | art-330 | Tongan |
| 普通话 | cmn-000 | 东加语 |
| 普通话 | cmn-000 | 汤加语 |
| Deutsch | deu-000 | Tongaisch |
| English | eng-000 | Tonga |
| français | fra-000 | tongan |
| русский | rus-000 | тонга |
| español | spa-000 | tongano |
| lea fakatonga | ton-000 | faka-Tonga |