| ISO 639-1 | art-004 |
| eo | |
| ISO 639-3 | art-001 | epo |
| ISO 639-2/T | art-002 | epo |
| ISO 639-2/B | art-003 | epo |
| ISO 639-3 Reference Names | art-289 | Esperanto |
| ISO 639-3 Print Names | art-290 | Esperanto |
| ISO 639-3 Inverted Names | art-291 | Esperanto |
| 普通话 | cmn-000 | 世界语 |
| Deutsch | deu-000 | Esperanto |
| English | eng-000 | Esperanto |
| Esperanto | epo-000 | Esperanto |
| français | fra-000 | espéranto |
| русский | rus-000 | эсперанто |
| español | spa-000 | esperanto |