| 80687 | Ipili | yia | | | Franklin (1975) | |
| 24116 | Irarutu | fəne | | | Voorhoeve (1975) | |
| 192029 | Isabi | kɛambu | | | Z'graggen (1980) | pig |
| 122247 | Isebe | fo | | | Z'graggen (1980) | pig |
| 22698 | Isirawa | wipi | | | Voorhoeve (1975) | |
| 198438 | Iteri | hwusu | | | Conrad and Dye (1975) | |
| 197270 | Iteri (Rocky Peak Dialect) | ᵽu | | | Conrad and Dye (1975) | |
| 237750 | Iwam | hu | | | Foley (2005) | |
| 178432 | Jilim | bu | | | Z'graggen (1980) | pig |
| 35732 | Kabola (Aimoli Dialect) | bʋy | | | Stokhof (1975) | |
| 36552 | Kabola (Hamap Dialect) | bi | | | Stokhof (1975) | |
| 37606 | Kabola (Pitumbang Dialect) | bʋy | | | Stokhof (1975) | |
| 34897 | Kafoa | fɛʔ | | | Stokhof (1975) | |
| 25637 | Kais | ofugu | | | Voorhoeve (1975) | |
| 218904 | Kaiy | i^ | | | Clouse (1997) | |
| 23143 | Kaiy | ei | | | Voorhoeve (1975) | |
| 261111 | Kaki Ae | aiparu | | | Strong (1911) | |
| 20008 | Kalabra | beak | | | Voorhoeve (1975) | |
| 195758 | Kalam | kaj | | | Pawley (2013) | |
| 16714 | Kaluli | kabɔ | | | Shaw (1986) | |
| 35966 | Kamang | pʰɛ | | | Stokhof (1975) | |
| 37021 | Kamang (Kolomane Dialect) | pʰi | | | Stokhof (1975) | |
| 38544 | Kamang (Langkuru Dialect) | pʰi | | | Stokhof (1975) | |
| 38310 | Kamang (Letley Dialect) | pɛ | | | Stokhof (1975) | |
| 38192 | Kamang (Pido 1 Dialect) | pe | | | Stokhof (1975) | |
| 37958 | Kamang (Pido 2 Dialect) | pey | | | Stokhof (1975) | |
| 73926 | Kamano | äfú' | | | Scott (1978) | |
| 32293 | Kambaira | 'pondi | | | SIL () | |
| 21407 | Kamberau | oʔa | | | Voorhoeve (1975) | |
| 21367 | Kamoro | oo | | | Voorhoeve (1975) | |
| 16514 | Kamula | ʌľiʌ | | | Shaw (1986) | |
| 237168 | Kanggape | ram | | | Foley (2005) | |
| 21053 | Kanum | kwer | | | Voorhoeve (1975) | |
| 224944 | Kapriman | fʌɣr | | | Dye et al (1968) | |
| 21768 | Karas | pep | | | Voorhoeve (1975) | |
| 122241 | Kare | biː | | | Z'graggen (1980) | pig |
| 23612 | Karon Dori | fane | | | Voorhoeve (1975) | |
| 34474 | Karon Dori | fani | | | Miedema & Welling (1985) | |
| 16414 | Kasua | kɔpɔľɔ | | | Shaw (1986) | |
| 218909 | Kaure | pi | | | Clouse (1997) | |
| 19441 | Kaure | pi | | | Voorhoeve (1975) | |
| 22576 | Kauwera | cubic | | | Voorhoeve (1975) | |
| 20612 | Kayagar | wakum | | | Voorhoeve (1975) | |
| 29276 | Kayagar | wakum | | | Voorhoeve (1971) | |
| 236854 | Kayan | markum | | | Foley (2005) | |
| 122244 | Kein | bo | | | Z'graggen (1980) | pig |
| 21848 | Kemberano | poxi | | | Voorhoeve (1975) | |
| 25917 | Kemtuik | nəmbo | | | Voorhoeve (1975) | |
| 178413 | Kesawai | usu | | | Z'graggen (1980) | pig |
| 33657 | Ketengban | besam | | | Heeschen (1978) | |
