| Deutsch | deu-000 |
| Altniederländisch | |
| ISO 639-PanLex | art-274 | odt-000 |
| ISO 639-3 Reference Names | art-289 | Old Dutch |
| Deutsch | deu-000 | Altniederfränkisch |
| English | eng-000 | Old Dutch |
| suomi | fin-000 | Muinaishollanti |
| suomi | fin-000 | muinaishollanti |
| français | fra-000 | vieux néerlandais |
| galego | glg-000 | neerlandés antigo |
| Nederlands | nld-000 | Oudnederlands |
| bokmål | nob-000 | gammelnederlandsk |
| português | por-000 | holandês antigo |
| svenska | swe-000 | fornnederländska |
| Vlaams | vls-000 | Oudnederlands |