| Name | Welsh language |
| Ethnologue status | 2 Provincial |
| Language family | Indo-European languages |
| Office | Welsh government |
| IETF | |
| Alphabet | Latin script |
| ISO 6391 | cy |
| ISO 6392 | wel (B)$#$cym (T) |
| ISO 6393 | cym |
| Speakers (people) | 791,000 |
| Manuscript | Book of Taliesin, The Dream of Rhonabwy |
| Micronation | |
| Publisher | |
| Former country | |
| Is a dialect | Yes |