| ISO 639-2/T | art-002 |
| dum | |
| ISO 639-3 | art-001 | dum |
| ISO 639-2/B | art-003 | dum |
| ISO 639-3 Reference Names | art-289 | Middle Dutch (ca. 1050-1350) |
| ISO 639-3 Print Names | art-290 | Middle Dutch (ca. 1050-1350) |
| ISO 639-3 Inverted Names | art-291 | Dutch, Middle (ca. 1050-1350) |