| xte | kete1254 | Ketengban | N,
M,
Eastern Mek | 102 |
| xrw | kara1495 | Karawa | S,
R,
Pouye-Karawa | 46 |
| xow | kowa1245 | Kowaki | N,
M,
C,
G,
N,
K,
T,
Nuclear Tibor | 316 |
| xop | kopa1248 | Kopar (Singarin Dialect) | L,
Nor | 225 |
| xop | kopa1248 | Kopar | L,
Nor | 102 |
| xod | kasu1243 | Kokoda (Kasuweri Dialect) | S,
E,
Kokoda | 38 |
| xod | koko1265 | Kokoda (Tarof Dialect) | S,
East South Bird's Head | 38 |
| xla | kamu1260 | Kamula | Kamula-Elevala | 205 |
| xeu | ahea1235 | Keoru-Ahia (Aheave Dialect) | E,
W,
Keoru-Ahia | 104 |
| xeu | keor1235 | Keoru-Ahia | E,
Western Eleman | 103 |
| xes | kesa1244 | Kesawai | N,
M,
R,
E,
Kesawai-Sausi | 307 |
| xau | kauw1242 | Kauwera | G,
K,
Kwerbaic | 40 |
| woi | kama1365 | Kamang (Pido 2 Dialect) | T,
A,
N,
C,
Abuic | 123 |
| woi | kama1365 | Kamang (Kolomane Dialect) | T,
A,
N,
C,
Abuic | 120 |
| woi | kama1365 | Kamang | T,
A,
N,
C,
Abuic | 126 |
| woi | kama1365 | Kamang (Langkuru Dialect) | T,
A,
N,
C,
Abuic | 121 |
| woi | kama1365 | Kamang (Letley Dialect) | T,
A,
N,
C,
Abuic | 122 |
| woi | kama1365 | Kamang (Pido 1 Dialect) | T,
A,
N,
C,
Abuic | 127 |
| tyn | komb1274 | Kombai | N,
A,
A,
G,
A,
Ndeiram | 71 |
| tpg | kula1280 | Kula | T,
A,
East Alor | 129 |
| tcq | kaiy1239 | Kaiy | L,
T,
E,
Doutai-Kai-Waritai | 235 |
| tbd | kaki1249 | Kaki Ae | T,
E,
Tate | 254 |
| skm | saka1292 | Kutong (Sakam Dialect) | N,
F,
F,
U,
Sakam-Som | 56 |
| prm | kibi1239 | Kibiri | T,
Kiwaian | 101 |
| pep | kunj1246 | Kunja (Peremka Dialect) | Y,
M,
T,
Eastern Tonda | 0 |
| kzz | kala1256 | Kalabra | W,
South West Bird's Head | 38 |
| kzv | komy1238 | Komyandaret | N,
A,
A,
G,
B,
Tsakwambo-Komyandaret | 211 |
| kzm | kais1235 | Kais | South Bird's Head Family | 40 |
| kyy | kamb1303 | Kambaira | N,
K,
K,
Unclassified Kainantu | 98 |
| kyt | kaya1328 | Kayagar | K,
Kaygir-Tamagario | 128 |
| kyo | kelo1247 | Klon | T,
A,
N,
West Alor-Straits-Pantar | 284 |
| kyo | prob1239 | Klon (Probur Dialect) | T,
A,
N,
W,
Klon | 119 |
| kyo | hale1239 | Klon (Halerman Dialect) | T,
A,
N,
W,
Klon | 120 |
| kyc | kyak1244 | Kyaka | N,
E,
Engan | 116 |
| kxz | kere1286 | Kerewo | K,
Turama-Kerewo | 101 |
| kxw | kona1242 | Konai | East Strickland | 100 |
| kwt | kwes1245 | Kwesten | T,
Tor | 43 |
| kwh | kowi1239 | Kowiai | A,
M,
G,
B,
S,
Geser-Gorom-Bati | 8 |
| kwe | nucl1595 | Kwerba | G,
K,
Kwerbaic | 41 |
| kwe | nucl1595 | Kwerba (Airmati Dialect) | G,
K,
Kwerbaic | 38 |
| 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 |
| kvd | kuii1253 | Kui | T,
A,
N,
Central Alor | 118 |
| kvd | kira1248 | Kui (Kiramang Dialect) | T,
A,
N,
C,
Kui (Indonesia) | 132 |
| kuo | kumu1247 | Kumukio | N,
F,
H,
W,
C,
D,
Kinalakna-Kumukio | 52 |
| kue | kuma1280 | Kuman | N,
C,
S,
N,
Kuman-Dom-Gunaa | 258 |
| kto | kuot1243 | Kuot | Language isolate | 293 |
| kql | kyen1243 | Kyenele (Kyaimbarang Dialect) | Y,
Miyak-Bun-Biwat | 117 |
| kql | kyen1243 | Kyenele (Miyak Dialect) | Y,
Miyak-Bun-Biwat | 98 |
