| Abbreviation | Definition |
|---|---|
| NOR | Norwegian |
| NPA | North Pacific Ocean |
| NSE | Nsenga |
| NSO | Sotho, Northern |
| NUB | Nubian Languages |
| NYA | Nyanja |
| NYJ | Nyanja |
| NYM | Nyamwezi |
| NYN | Nyankole |
| NYO | Nyoro |
| NZI | Nzima |
| OAX | Oaxaca |
| OBE | Object Back End |
| OCI | Langue d'Oc (post 1500) |
| OFL | Old French Language |
| OHG | Old High German |
| OJI | Ojibwa |
| ORI | Oriya |
| ORM | Oromo |
| OSA | Osage |