Language Family: Sepik:
| Isocode | Glottocode | Language | Classification | Count |
|---|---|---|---|---|
| yss | Yessan-Mayo | S, Tama | 48 | |
| yee | Yimas | R, L, Karawari | 48 | |
| sim | Mende | S, Nukuma | 48 | |
| nux | Mehek | S, Tama | 36 | |
| nnm | Namia | S, Yellow River | 48 | |
| kmo | Kwoma | S, Nukuma | 48 | |
| kmn | Awtuw | S, Ram | 48 | |
| iws | Sepik Iwam | S, Iwam | 48 | |
| ham | Hewa | S, S, Sanio | 40 | |
| dju | Kapriman | S, S, Bahinemo | 48 | |
| amp | Alamblak | S, S, Alamblak | 48 | |
| aau | Abau | S, Abau | 58 |
12 languages