cog
coh
coj
cok
col
com
con
coo
cop
coq
cor
cos
cot
cou
cov
cow
cox
coy
coz
cpa
cpb
cpc
cpg
cpi
cpn
cpo
cps
cpu
cpx
cpy
cqd
cqu
cra
crb
crc
crd
cre
crf
crg
crh
cri
crj
crk
crl
crm
crn
cro
crq
crr
crs
ISO 639-3