| ISO 639-3 | art-001 |
| epo | |
| ISO 639-2/T | art-002 | epo |
| ISO 639-2/B | art-003 | epo |
| ISO 639-1 | art-004 | eo |
| ISO 639-3 Reference Names | art-289 | Esperanto |
| ISO 639-3 Print Names | art-290 | Esperanto |
| ISO 639-3 Inverted Names | art-291 | Esperanto |
| Ethnologue Primary Language Names | art-323 | Esperanto |
| Glottolog Languoid Names | art-326 | Esperanto |
| Glottocode | art-327 | espe1235 |
| Glottolog Primary Key | art-328 | 43565 |
| Ethnologue Language Names | art-330 | Eo |
| Ethnologue Language Names | art-330 | Esperanto |
| Ethnologue Language Names | art-330 | La Lingvo Internacia |
| 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 |