| kmo | | Kwoma | S,
Nukuma | 48 |
| gww | | Kwini | A,
Worrorran | 76 |
| xwa | | Kwaza | Language isolate | 48 |
| knp | | Kwanja (Njanga Dialect) | | 48 |
| tnk | | Kwamera | A,
M,
C,
E,
O,
C,
S,
Tanna | 48 |
| cwt | | Kuwaataay (Diembering Dialect) | N,
A,
A,
N,
B,
J,
J,
Kwatay | 44 |
| | Kuuku Ya'u | | 48 |
| | Kuuk Thaayorre | | 48 |
| kru | | Kurukh | North Dravidian | 50 |
| xkz | | Kurtöp | S,
T,
W,
B,
E,
Bumthang | 28 |
| mkn | | Kupang Malay | A,
M,
M,
M,
Malay | 48 |
| pep | | Kunja / Bondobol | S,
M,
Tonda | 76 |
| kup | | Kunimaipa | T,
S,
G,
Kunimaipa | 48 |
| kvn | | Kuna | C,
C,
I,
E,
Kuna | 0 |
| nku | | Kulango, Bouna | N,
A,
V,
N,
G,
Kulango | 48 |
| gvn | | Kuku Yalanji | A,
P,
N,
Pama-Maric | 76 |
| kxb | | Krobu | N,
A,
V,
K,
N,
P,
T,
Krobu | 44 |
| mcm | | Kristang | C,
Portuguese-based | 76 |
| kff | | Koya | D,
S,
G,
K,
M,
Kui-Kuvi | 48 |
| gvc | | Kotiria | | 48 |
| khe | | Korowai | T,
O,
A,
Korowai | 282 |
| kqj | | Koromira | S,
Nasioi | 36 |
| kfz | | Koromfe | N,
A,
V,
N,
G,
C,
N,
Kurumfe | 48 |
| cou | | Konyagi | N,
A,
A,
N,
E,
Tenda | 44 |
| kma | | Konni | N,
A,
V,
N,
G,
C,
N,
O,
Buli-Koma | 48 |
| | Komnzo | Yam Family; Tonda Branch | 76 |
| xbi | | Kombio | T,
K,
Kombio | 48 |
| tyn | | Kombai | T,
O,
A,
Dumut | 76 |
| klc | | Kolbila | N,
A,
V,
N,
A,
A,
L,
Leko | 48 |
| kkk | | Kokota | Western Oceanic. | 48 |
| xod | | Kokoda | T,
S,
S,
Central | 48 |
| kqi | | Koitabu | T,
S,
K,
Koiaric | 48 |
| vko | | Kodeoha | A,
M,
C,
E,
S,
B,
W,
West Coast | 76 |
| kpw | | Kobon | T,
M,
Kalam-Kobon | 350 |
| cku | | Koasati | M,
E,
C,
A,
Alabama-Koasati | 48 |
| kyo | | Klon | T,
A,
Alor | 259 |
| kjd | | Kiwai, Southern | T,
Kiwaian | 48 |
| kiw | | Kiwai, Northeast | T,
Kiwaian | 48 |
| kio | | Kiowa | Kiowa-Tanoan | 48 |
| kig | | Kimaghima | T,
Kolopom | 88 |
| khm | | Khmer (Central Dialect) | A,
M,
E,
Khmer | 48 |
| kjl | | Kham (Western Parbate) (Takale Dialect) | S,
T,
W,
H,
C,
K,
Kham | 48 |
| ket | | Ket | Yeniseian | 48 |
| xxk | | Keo (Udiworowatu Dialect) | Central-Malayo-Polynesian | 84 |
| dmo | | Kemedzung | N,
A,
V,
B,
B,
S,
Beboid | 48 |
| sbc | | Kele | A,
M,
C,
E,
O,
A,
E,
M,
East | 84 |
| gyd | | Kayardild | A,
Tangkic | 78 |
| xaw | | Kawaiisu | U,
N,
N,
Southern | 48 |
| krx | | Karon | N,
A,
A,
N,
B,
J,
J,
Karon-Mlomp | 44 |
| xrb | | Karaboro, Eastern | N,
A,
V,
N,
G,
S,
Karaboro | 48 |
