| xod | koko1265 | Kokoda (Tarof Dialect) | S,
East South Bird's Head | 38 |
| kasu1243 | Kokoda (Kasueri Dialect) | S,
East South Bird's Head | 144 |
| xod | kasu1243 | Kokoda (Kasuweri Dialect) | S,
E,
Kokoda | 38 |
| taro1259 | Kokoda (Tarof Dialect) | S,
East South Bird's Head | 6 |
| negr1235 | Kokoda (Negeri Besar Dialect) | S,
East South Bird's Head | 5 |
| kol | kolp1236 | Kol | Isolate | 219 |
| kpf | komb1273 | Komba (Ândâ River Dialect) | N,
F,
H,
W,
C,
K,
Selepet-Komba | 161 |
| kpf | komb1273 | Komba (Gwama River (North) Dialect) | N,
F,
H,
W,
C,
K,
Selepet-Komba | 160 |
| kpf | komb1273 | Komba (Gwama River (South) Dialect) | N,
F,
H,
W,
C,
K,
Selepet-Komba | 159 |
| kpf | komb1273 | Komba (Puleng River Dialect) | N,
F,
H,
W,
C,
K,
Selepet-Komba | 161 |
| kpf | komb1273 | Komba | N,
F,
H,
W,
C,
K,
Selepet-Komba | 198 |
| tyn | komb1274 | Kombai | N,
A,
A,
G,
A,
Ndeiram | 71 |
| kzv | komy1238 | Komyandaret | N,
A,
A,
G,
B,
Tsakwambo-Komyandaret | 211 |
| kxw | kona1242 | Konai | East Strickland | 100 |
| knd | kond1303 | Konda | Konda-Yahadian | 40 |
| kdw | kone1241 | Koneraw | Mombum-Koneraw | 37 |
| xop | kopa1248 | Kopar (Singarin Dialect) | L,
Nor | 225 |
| xop | kopa1248 | Kopar | L,
Nor | 102 |
| kpr | kora1294 | Korafe (Mokorua Dialect) | N,
G,
B,
N,
S,
C,
Gaena-Korafe | 83 |
| kpr | kora1294 | Korafe (Rabade Dialect) | N,
G,
B,
N,
S,
C,
Gaena-Korafe | 91 |
| kpr | kora1294 | Korafe | N,
G,
B,
N,
S,
C,
Gaena-Korafe | 52 |
| koz | kora1296 | Korak | N,
M,
C,
G,
Kowan | 347 |
| kpq | koru1245 | Korapun-Sela | N,
M,
Western Mek | 40 |
| khe | koro1312 | Korowai | N,
A,
A,
G,
Becking-Dawi | 206 |
| kiq | kosa1251 | Kosare | Kaure-Kosare | 98 |
| kqb | kova1243 | Kovai | N,
F,
H,
E,
Trans Vitiaz | 40 |
| xow | kowa1245 | Kowaki | N,
M,
C,
G,
N,
K,
T,
Nuclear Tibor | 316 |
| kwh | kowi1239 | Kowiai | A,
M,
G,
B,
S,
Geser-Gorom-Bati | 8 |
| kgf | kube1244 | Kube | N,
F,
H,
W,
R,
Pindiu | 194 |
| jko | kubo1242 | Kubo | E,
Kubo-Samo-Bibo | 248 |
| kvd | kuii1253 | Kui | T,
A,
N,
Central Alor | 118 |
| kvd | kira1248 | Kui (Kiramang Dialect) | T,
A,
N,
C,
Kui (Indonesia) | 132 |
| tpg | kula1280 | Kula | T,
A,
East Alor | 129 |
| fait1240 | Kulsab | N,
M,
K,
S,
S,
East Sogeram | 35 |
| kue | kuma1280 | Kuman | N,
C,
S,
N,
Kuman-Dom-Gunaa | 258 |
| kuo | kumu1247 | Kumukio | N,
F,
H,
W,
C,
D,
Kinalakna-Kumukio | 52 |
| kvg | kuni1265 | Kuni-Boazi | A,
M,
Boazi | 265 |
| kvg | kuni1265 | Kuni-Boazi (Kuini Dialect) | A,
M,
Boazi | 4 |
| kvg | kuni1265 | Kuni-Boazi (Boazi Dialect) | A,
M,
Boazi | 49 |
| kup | kuni1267 | Kunimaipa | Kunimaipan | 118 |
| pep | kunj1246 | Kunja (Peremka Dialect) | Y,
M,
T,
Eastern Tonda | 0 |
| kto | kuot1243 | Kuot | Language isolate | 293 |
| kjr | kuru1305 | Kurudu | A,
M,
E,
S,
C,
Y,
Eastern Yapen | 41 |
| skm | saka1292 | Kutong (Sakam Dialect) | N,
F,
F,
U,
Sakam-Som | 56 |
| kwe | nucl1595 | Kwerba (Airmati Dialect) | G,
K,
Kwerbaic | 38 |
| kwe | nucl1595 | Kwerba | G,
K,
Kwerbaic | 41 |
| kkb | kwer1264 | Kwerisa | L,
T,
E,
Doutai-Kai-Waritai | 37 |
| kwt | kwes1245 | Kwesten | T,
Tor | 43 |
| kmo | kwom1262 | Kwoma | S,
Nukuma | 92 |
| kyc | kyak1244 | Kyaka | N,
E,
Engan | 116 |
