| 6816 | Kerewo | mototobe | | | Wurm (1973) | |
| 176744 | Kesawai | tama mɛa | | | Z'graggen (1980) | tongue |
| 33594 | Ketengban | lyemngwe | | | Heeschen (1978) | |
| 33400 | Keuw | áalì-yò | | | Kamholz (2012) | |
| 6403 | Kibiri | bei | | | Wurm (1973) | |
| 154903 | Kinalakna | nembalam | | | McElhanon and Voorhoeve (1970) | tongue |
| 237093 | Kire | ze | | | Foley (2005) | |
| 212857 | Kirikiri | abla | | | Clouse (1997) | |
| 212856 | Kirikiri (Faia Dialect) | oma | | | Clouse (1997) | |
| 77658 | Klon | leb | | | Baird (2008) | |
| 35101 | Klon (Halerman Dialect) | nɛl'eeb | | | Stokhof (1975) | |
| 34982 | Klon (Probur Dialect) | nɛl'eeb- | | | Stokhof (1975) | |
| 139769 | Kobol | mer̃ | | | Z'graggen (1980) | (tongue) |
| 196280 | Kobon | aɫab | + | | Pawley (2013) | |
| 163565 | Kobon | a'ʎampʰ | | | Davies and Comrie (1985) | tongue |
| 230381 | Kol | raal | | | SIL (1981) | |
| 229611 | Kol | dal kɛřnɛ | | | SIL (1962) | |
| 91515 | Komba | nâbâlam- | (its) tongue | | McElhanon (1967) | (its) tongue |
| 154911 | Komba | nembilam | | | McElhanon and Voorhoeve (1970) | tongue |
| 148907 | Komba (Ândâ River Dialect) | nâmbâlâm | | | Southwell (1976) | tongue |
| 148814 | Komba (Gwama River (North) Dialect) | nimbulam | | | Southwell (1976) | tongue |
| 148860 | Komba (Gwama River (South) Dialect) | nimbulam | | | Southwell (1976) | tongue |
| 148953 | Komba (Puleng River Dialect) | nâmbâlâm | | | Southwell (1976) | tongue |
| 201627 | Kombai | fɑgɑ | | | Voorhoeve (2000) | |
| 210749 | Komyandaret | hɜj | | | Hughes (2009) | |
| 16591 | Konai | i | | | Shaw (1986) | |
| 245357 | Kopar (Singarin Dialect) | 'mbəneŋ | | | SIL (1977) | |
| 240450 | Kopar (Singarin Dialect) | ˈmbəneŋ | | | Abbott (1985) | |
| 236114 | Kopar | mimiŋ | | | Foley (2005) | |
| 235444 | Kopar | mimiŋ | | | Foley (2005) | |
| 28258 | Korafe | aƀiƀa | | | Wilson (1969) | |
| 55210 | Korafe (Mokorua Dialect) | a'βiβa | tongue | | Smallhorn (2011) | |
| 55211 | Korafe (Rabade Dialect) | a'βiwa | tongue | | Smallhorn (2011) | |
| 139755 | Korak | -kumilok | | | Z'graggen (1980) | (tongue) |
| 210543 | Korowai | te:p | | | Hughes (2009) | |
| 33838 | Kosare | pɛrɛ´ | | | Heeschen (1978) | |
| 154895 | Kovai | biŋio | | | McElhanon and Voorhoeve (1970) | tongue |
| 139764 | Kowaki | nʌbɛʌʔ | | | Z'graggen (1980) | (tongue) |
| 91521 | Kube | edzeraŋ- | (its) tongue | | McElhanon (1967) | (its) tongue |
| 154909 | Kube | etselaŋ | | | McElhanon and Voorhoeve (1970) | tongue |
| 5686 | Kubo | i | | | Shaw (1973) | |
| 154846 | Kubo | i | | | McElhanon and Voorhoeve (1970) | tongue |
| 7158 | Kubo | i: | | | Shaw (1986) | |
| 36169 | Kui | nαl'ibar | | | Stokhof (1975) | |
| 37691 | Kui (Kiramang Dialect) | nɛl'ibar | | | Stokhof (1975) | |
| 36403 | Kula | ŋanl'ipu | | | Stokhof (1975) | |
| 743 | Kuman | dirambino | | | Trefry (1969) | |
| 154904 | Kumukio | nembelam | | | McElhanon and Voorhoeve (1970) | tongue |
| 29849 | Kuni-Boazi | sɑs | | | Voorhoeve (1970) | |
| 154853 | Kuni-Boazi (Boazi Dialect) | nasam | | | McElhanon and Voorhoeve (1970) | tongue |
