Orunyoro
Oruone
Oruro
Orutagwenda
Orya
Osage
Osage-Kansa
Ōsaka
Osamayi
Osatu
Osayen
Oscan
Oscan-Umbrian
Oshima
Osing
Oslo
Osokom
Oso Moko
Osopong
Ososo
Osse
Ossetian
Ossetic
Österbotten
Ostfriesisch-Groningisch
Ost-Kxoe
Ostrogoth
Ostuacín
Osu
Osumi-ben
Osum-Wadaginam-Pomoikan
Otali
Otank
Otapha
Ot Balawan
Ot Banu'u
Ot Danum
Oti
Oti North Guang
Oti-Volta
Oti-Volta Oriental
Ot Murung 1
Oto
Ot Olang
Otomaco
Otomanguean
Otomi
Otomian
Otopamean
Otopame-Chinantecan
Glottolog Languoid Names