| Code: | sga |
| Name: | Old Irish |
| URL Form: | old-irish |
| ISO 639-1: | |
| ISO 639-2: | sga |
| ISO 639-2-ALT: | |
| ISO 639-3: | sga |
| ISO 639-5: | |
| IETF BCP 47: | sga |
| Scope: | language |
| Dates: | -900 |
| Extinct: | yes |
| Constructed: | no |
| Glossary Link: | |
| Wikipedia: | |
| Alt Names: | |
| Relevant Usage: | Old Irish; |
| Parent: | Celtic |
| Children: | |
| Ancestor: | Proto-Celtic |
| Descendants: | Middle Irish; |
| Description: | Old Irish was the form of the Irish language spoken up to the 10th century. |