| O'chi'chi' Language
|
Old High German (ca. 750-1050) Language
|
Ontenu Language
|
| O'du Language
|
Old Hittite Language
|
Ontong Java Language
|
| Obanliku Language
|
Old Hungarian Language
|
Oorlams Language
|
| Obispeño Language
|
Old Irish (to 900) Language
|
Opao Language
|
| Oblo Language
|
Old Japanese Language
|
Opata Language
|
| Obo Manobo Language
|
Old Kentish Sign Language Language
|
Opuuo Language
|
| Obokuitai Language
|
Old Korean (3rd-9th cent.) Language
|
Orang Kanaq Language
|
| Obolo Language
|
Old Manipuri Language
|
Orang Seletar Language
|
| Obulom Language
|
Old Marathi Language
|
Oraon Sadri Language
|
| Ocaina Language
|
Old Mon Language
|
Orejón Language
|
| Occitan (post 1500) Language
|
Old Norse Language
|
Oring Language
|
| Ocotepec Mixtec Language
|
Old Nubian Language
|
Oriya Language
|
| Ocotlán Zapotec Language
|
Old Ossetic Language
|
Orizaba Nahuatl Language
|
| Od Language
|
Old Persian (ca. 600-400 B.C.) Language
|
Orma Language
|
| Odiai Language
|
Old Provençal (to 1500) Language
|
Ormu Language
|
| Odoodee Language
|
Old Russian Language
|
Ormuri Language
|
| Odual Language
|
Old Saxon Language
|
Oro Language
|
| Odut Language
|
Old Spanish Language
|
Oro Win Language
|
| Ofayé Language
|
Old Tamil Language
|
Oroch Language
|
| Official Aramaic (700-300 BCE) Language
|
Old Tibetan Language
|
Oroha Language
|
| Ofo Language
|
Old Turkish Language
|
Orok Language
|
| Ogbah Language
|
Old Uighur Language
|
Orokaiva Language
|
| Ogbia Language
|
Old Welsh Language
|
Oroko Language
|
| Ogbogolo Language
|
Olekha Language
|
Orokolo Language
|
| Ogbronuagum Language
|
Olo Language
|
Oromo Language
|
| Ogea Language
|
Oloma Language
|
Oroqen Language
|
| Oirata Language
|
Olrat Language
|
Orowe Language
|
| Ojibwa Language
|
Olu'bo Language
|
Oruma Language
|
| Ojitlán Chinantec Language
|
Olulumo-Ikom Language
|
Orya Language
|
| Okanagan Language
|
Oluta Popoluca Language
|
Osage Language
|
| Oki-No-Erabu Language
|
Omagua Language
|
Osatu Language
|
| Okiek Language
|
Omaha-Ponca Language
|
Oscan Language
|
| Oko-Eni-Osayen Language
|
Omani Arabic Language
|
Osing Language
|
| Oko-Juwoi Language
|
Omati Language
|
Ososo Language
|
| Okobo Language
|
Ombamba Language
|
Ossetian Language
|
| Okodia Language
|
Ombo Language
|
Ot Danum Language
|
| Okolod Language
|
Omejes Language
|
Otank Language
|
| Okpamheri Language
|
Ometepec Nahuatl Language
|
Oti Language
|
| Okpe (Northwestern Edo) Language
|
Omi Language
|
Otoro Language
|
| Okpe (Southwestern Edo) Language
|
Ömie Language
|
Ottawa Language
|
| Oksapmin Language
|
Omok Language
|
Ottoman Turkish (1500-1928) Language
|
| Oku Language
|
Omotik Language
|
Otuho Language
|
| Old Aramaic (up to 700 BCE) Language
|
Omurano Language
|
Otuke Language
|
| Old Avar Language
|
Ona Language
|
Ouma Language
|
| Old Breton Language
|
Oneida Language
|
Ounge Language
|
| Old Burmese Language
|
Ong Language
|
Owa Language
|
| Old Chinese Language
|
Önge Language
|
Owenia Language
|
| Old Cornish Language
|
Onin Language
|
Owiniga Language
|
| Old Dutch Language
|
Onin Based Pidgin Language
|
Oy Language
|
| Old English (ca. 450-1100) Language
|
Onjob Language
|
Oya'oya Language
|
| Old French (842-ca. 1400) Language
|
Ono Language
|
Oyda Language
|
| Old Frisian Language
|
Onobasulu Language
|
Ozolotepec Zapotec Language
|
| Old Georgian Language
|
Onondaga Language
|
Ozumacín Chinantec Language
|