| ISO 639-3 | art-001 |
| bre | |
| ISO 639-2/T | art-002 | bre |
| ISO 639-2/B | art-003 | bre |
| ISO 639-1 | art-004 | br |
| ISO 639-3 Reference Names | art-289 | Breton |
| ISO 639-3 Print Names | art-290 | Breton |
| ISO 639-3 Inverted Names | art-291 | Breton |
| Ethnologue Primary Language Names | art-323 | Breton |
| Glottolog Languoid Names | art-326 | Breton |
| Glottocode | art-327 | bret1244 |
| Glottolog Primary Key | art-328 | 38486 |
| UNESCO Atlas of the World’s Languages in Danger ID | art-329 | 336 |
| Ethnologue Language Names | art-330 | Breton |
| Ethnologue Language Names | art-330 | Brezhoneg |
| Ethnologue Language Names | art-330 | Cornouaillais |
| Ethnologue Language Names | art-330 | Gwenedeg |
| Ethnologue Language Names | art-330 | Kerneveg |
| Ethnologue Language Names | art-330 | Leonais |
| Ethnologue Language Names | art-330 | Leoneg |
| Ethnologue Language Names | art-330 | Tregerieg |
| Ethnologue Language Names | art-330 | Tregorrois |
| Ethnologue Language Names | art-330 | Vannetais |
| brezhoneg | bre-000 | brezhoneg |
| 普通话 | cmn-000 | 布列塔尼语 |
| Deutsch | deu-000 | Bretonisch |
| English | eng-000 | Breton |
| français | fra-000 | breton |
| русский | rus-000 | бретонский |
| español | spa-000 | bretón |