One
Oneida
Onesso
One (Yasa)
Ong
Ongamo-Maa
Önge
Ongota
Ong-Ta'oih
Onin
Onin Based Pidgin
Onin based pidgin (Pidgin)
Oninic
Onitsha
Onjob
Ono
Onobasulu
Onondaga
Onotsu
Ono (weri)
Ontenu
Onti
Ontong Java
Onumo
Onya
Ooku
Oorlams
Oost-Vlaams
Oostvlaams
Ooweekeeno
Opaina
Opalo
Opao
Opata
Opata-Eudeve
Opëno
Operemo
Opif
Opón-Carare
Opon-Yukpan
Oporomo
Oporoza
Oporto
Opuuo
Opuuo-Twampa-Komo
Ora
Orami
Oran
Orange River Afrikaans
Orang Kanaq
Glottolog Languoid Names