| ISO 639-3 | art-001 |
| ltg | |
| ISO 639-3 Reference Names | art-289 | Latgalian |
| ISO 639-3 Print Names | art-290 | Latgalian |
| ISO 639-3 Inverted Names | art-291 | Latgalian |
| Ethnologue Primary Language Names | art-323 | Latgalian |
| Ethnologue Language Names | art-330 | Latgalian |
| Ethnologue Language Names | art-330 | Latgaliešu |
| English | eng-000 | Latgalian |