| Name | Breton language |
| Ethnologue status | 7 Shifting |
| Language family | Indo-European languages |
| Office | |
| IETF | |
| Alphabet | |
| ISO 6391 | br |
| ISO 6392 | bre |
| ISO 6393 | Variously:$#$bre –Modern Breton$#$xbm –Middle Breton$#$obt –Old Breton |
| Speakers (people) | 400,000 (2007) |
| Manuscript | |
| Micronation | |
| Publisher | |
| Former country | |
| Is a dialect | Yes |