| Abbreviation | Definition |
|---|---|
| DEL | Delaware |
| DEU | Deutsch (German) |
| DHK | Dhaka |
| DIK | Southwestern Dinka, a language of Sudan |
| DIN | Dinka |
| DIV | Divehi |
| DOI | Dogri |
| DOV | Dombe |
| DRA | Dravidian (Other) |
| DUA | Duala |
| DUM | Dutch, Middle (ca. 1050-1350) |
| DUT | Dutch |
| DYU | Dyula |
| DZO | Dzongkha |
| EAF | East Africa |
| EAS | East Asia |
| ECA | Early Central Anatolian |
| EFI | Efik |
| EGY | Egyptian (Ancient) |
| EKA | Ekajuk |