| 普通话 | cmn-000 |
| 东加语 | |
| ISO 639-3 | art-001 | ton |
| ISO 639-2/B | art-003 | ton |
| ISO 639-1 | art-004 | to |
| ISO 639-3 Inverted Names | art-291 | Tonga (Tonga Islands) |
| 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 |