| Glottocode | art-327 |
| wels1247 | |
| ISO 639-3 | art-001 | cym |
| Glottolog Languoid Names | art-326 | Welsh |
| Glottolog Primary Key | art-328 | 38482 |
| UNESCO Atlas of the World’s Languages in Danger ID | art-329 | 425 |
| English | eng-000 | Welsh |
| français | fra-000 | gallois |
| español | spa-000 | galés |