ISO 639:o

|-
!`[[ISO 639:oaa|oaa]]` 
| || ||I/L|| || ||Orok||
|-
!`[[ISO 639:oac|oac]]` 
| || ||I/L|| || ||Oroch||
|-
!`[[ISO 639:oak|oak]]` 
| || ||I/L||Indo-European||নোয়াখাইল্লা||Noakhailla; Noakhali||
|-
!`[[ISO 639:oar|oar]]` 
| || ||I/H||Afro-Asiatic|| ||Ancient Aramaic (up to 700 BCE);Old Aramaic (up to 700 BCE)||
|-
!`[[ISO 639:oav|oav]]` 
| || ||I/H||Northeast Caucasian||اوار ماض||Old Avar||
|-
!`[[ISO 639:obi|obi]]` 
| || ||I/E|| || ||Obispeño||
|-
!`[[ISO 639:obk|obk]]` 
| || ||I/L|| || ||Southern Bontok||
|-
!`[[ISO 639:obl|obl]]` 
| || ||I/L|| || ||Oblo||
|-
!`[[ISO 639:obm|obm]]` 
| || ||I/H|| || ||Moabite||
|-
!`[[ISO 639:obo|obo]]` 
| || ||I/L|| || ||Obo Manobo||
|-
!`[[ISO 639:obr|obr]]` 
| || ||I/H||Sino-Tibetan|| ||Old Burmese||
|-
!`[[ISO 639:obt|obt]]` 
| || ||I/H||Indo-European||old brezhoneg||Old Breton||
|-
!`[[ISO 639:obu|obu]]` 
| || ||I/L|| || ||Obulom||
|-
!`[[ISO 639:oca|oca]]` 
| || ||I/L|| || ||Ocaina||
|-
!(`[[ISO 639:occ|occ]]`) 
| || ||I/C|| || ||Occidental||
|-
!`[[ISO 639:och|och]]` 
| || ||I/H||Sino-Tibetan|| ||Old Chinese||
|-
!`[[ISO 639:oci|oci]]` 
|`oc`||`oci`||I/L||Indo-European||occitan||Occitan (post 1500)||
|-
!`[[ISO 639:ocm|ocm]]` 
| || ||I/H||Austronesian|| ||Old Cham||
|-
!`[[ISO 639:oco|oco]]` 
| || ||I/H||Indo-European||old Kernewek||Old Cornish||
|-
!`[[ISO 639:ocu|ocu]]` 
| || ||I/L|| || ||Atzingo Matlatzinca||
|-
!`[[ISO 639:oda|oda]]` 
| || ||I/L|| || ||Odut||
|-
!`[[ISO 639:odk|odk]]` 
| || ||I/L|| || ||Od||
|-
!`[[ISO 639:odt|odt]]` 
| || ||I/H||Indo-European||*thiudisc||Old Dutch||
|-
!`[[ISO 639:odu|odu]]` 
| || ||I/L|| || ||Odual||
|-
!`[[ISO 639:ofo|ofo]]` 
| || ||I/E|| || ||Ofo||
|-
!`[[ISO 639:ofs|ofs]]` 
| || ||I/H||Indo-European||Frīsesk||Old Frisian||
|-
!`[[ISO 639:ofu|ofu]]` 
| || ||I/L|| || ||Efutop||
|-
!`[[ISO 639:ogb|ogb]]` 
| || ||I/L|| || ||Ogbia||
|-
!`[[ISO 639:ogc|ogc]]` 
| || ||I/L|| || ||Ogbah||
|-
!`[[ISO 639:oge|oge]]` 
| || ||I/H||Kartvelian||ႤႬႠჂ ႵႠႰႧႭჃႪႨ||Old Georgian||
|-
!`[[ISO 639:ogg|ogg]]` 
| || ||I/L|| || ||Ogbogolo||
|-
!(`[[ISO 639:ogn|ogn]]`) 
| || ||I/L|| || ||Ogan||
|-
!`[[ISO 639:ogo|ogo]]` 
| || ||I/L|| || ||Khana||
|-
!`[[ISO 639:ogu|ogu]]` 
| || ||I/L|| || ||Ogbronuagum||
|-
!`[[ISO 639:oht|oht]]` 
| || ||I/H||Indo-European||𒌷𒉌𒅆𒇷||Old Hittite||
|-
!`[[ISO 639:ohu|ohu]]` 
| || ||I/H||Uralic|| ||Old Hungarian||
|-
!`[[ISO 639:oia|oia]]` 
| || ||I/L|| || ||Oirata||
|-
!`[[ISO 639:oie|oie]]` 
| || ||I/L||Nilo-Saharan|| ||Okolie||
|-
!`[[ISO 639:oin|oin]]` 
| || ||I/L|| || ||Inebu One||
|-
!`[[ISO 639:ojb|ojb]]` 
| || ||I/L|| || Anishinaabemowin (Ojibwemowin) ||Northwestern Ojibwa||
|-
!`[[ISO 639:ojc|ojc]]` 
| || ||I/L|| || Anishinaabemowin (Ojibwemowin) ||Central Ojibwa||
|-
!`[[ISO 639:ojg|ojg]]` 
| || ||I/L|| || Nishnaabemwin (Jibwemwin) ||Eastern Ojibwa||
|-
!`[[ISO 639:oji|oji]]` 
|`oj`||`oji`||M/L||Cree||ᐊᓂᔑᓇᐯᒧᐎᓐ (Anishinaabemowin)||Ojibwa||
|-
!`[[ISO 639:ojp|ojp]]` 
| || ||I/H||Japonic||上代日本語; 大和言葉||Old Japanese||
|-
!`[[ISO 639:ojs|ojs]]` 
| || ||I/L|| || ᐊᓂᔑᓂᓂᒧᐎᓐ (Anishininiimowin) ||Severn Ojibwa||
|-
!`[[ISO 639:ojv|ojv]]` 
| || ||I/L|| || ||Ontong Java||
|-
!`[[ISO 639:ojw|ojw]]` 
| || ||I/L|| || Anihšināpēmowin (Nakawēmowin) ||Western Ojibwa||
|-
!`[[ISO 639:oka|oka]]` 
| || ||I/L|| || ||Okanagan||
|-
!`[[ISO 639:okb|okb]]` 
| || ||I/L|| || ||Okobo||
|-
!`[[ISO 639:okc|okc]]` 
| || ||I/L||Niger–Congo|| ||Kobo||
|-
!`[[ISO 639:okd|okd]]` 
| || ||I/L|| || ||Okodia||
|-
!`[[ISO 639:oke|oke]]` 
| || ||I/L|| || ||Okpe (Southwestern Edo)||
|-
!`[[ISO 639:okg|okg]]` 
| || ||I/E|| || ||Koko Babangk||
|-
!`[[ISO 639:okh|okh]]` 
| || ||I/L|| || ||Koresh-e Rostam||
|-
!`[[ISO 639:oki|oki]]` 
| || ||I/L|| || ||Okiek||
|-
!`[[ISO 639:okj|okj]]` 
| || ||I/E|| || ||Oko-Juwoi||
|-
!`[[ISO 639:okk|okk]]` 
| || ||I/L|| || ||Kwamtim One||
|-
!`[[ISO 639:okl|okl]]` 
| || ||I/E||village sign|| ||Old Kentish Sign Language||
|-
!`[[ISO 639:okm|okm]]` 
| || ||I/H|| || ||Middle Korean (10th-16th cent.)||
|-
!`[[ISO 639:okn|okn]]` 
| || ||I/L|| || ||Oki-No-Erabu||
|-
!`[[ISO 639:oko|oko]]` 
| || ||I/H||Koreanic||||Old Korean (3rd-9th cent.)||
|-
!`[[ISO 639:okr|okr]]` 
| || ||I/L|| || ||Kirike||
|-
!`[[ISO 639:oks|oks]]` 
| || ||I/L|| || ||Oko-Eni-Osayen||
|-
!`[[ISO 639:oku|oku]]` 
| || ||I/L|| || ||Oku||
|-
!`[[ISO 639:okv|okv]]` 
| || ||I/L|| || ||Orokaiva||
|-
!`[[ISO 639:okx|okx]]` 
| || ||I/L|| || ||Okpe (Northwestern Edo)||
|-
!`[[ISO 639:okz|okz]]` 
| || ||I/H||Austroasiatic|| ||Old Khmer||
|-
!`[[ISO 639:ola|ola]]` 
| || ||I/L|| || ||Walungge||
|-
!`[[ISO 639:old|old]]` 
| || ||I/L|| || ||Mochi||
|-
!`[[ISO 639:ole|ole]]` 
| || ||I/L||Sino-Tibetan? / isolate?|| ||Olekha||
|-
!`[[ISO 639:olk|olk]]` 
| || ||I/E|| || ||Olkol||
|-
!`[[ISO 639:olm|olm]]` 
| || ||I/L|| || ||Oloma||
|-
!`[[ISO 639:olo|olo]]` 
| || ||I/L|| || ||Livvi||
|-
!`[[ISO 639:olr|olr]]` 
| || ||I/L|| || ||Olrat||
|-
!`[[ISO 639:olt|olt]]` 
| || ||I/H||Indo-European||old lietuvių||Old Lithuanian||
|-
!`[[ISO 639:olu|olu]]` 
| || ||I/L||Niger–Congo|| ||Kuvale||
|-
!`[[ISO 639:oma|oma]]` 
| || ||I/L|| || ||Omaha-Ponca||
|-
!`[[ISO 639:omb|omb]]` 
| || ||I/L|| || ||East Ambae||
|-
!`[[ISO 639:omc|omc]]` 
| || ||I/E|| || ||Mochica||
|-
!(`[[ISO 639:ome|ome]]`) 
| || ||I/E|| || ||Omejes||
|-
!`[[ISO 639:omg|omg]]` 
| || ||I/L|| || ||Omagua||
|-
!`[[ISO 639:omi|omi]]` 
| || ||I/L|| || ||Omi||
|-
!`[[ISO 639:omk|omk]]` 
| || ||I/E|| || ||Omok||
|-
!`[[ISO 639:oml|oml]]` 
| || ||I/L|| || ||Ombo||
|-
!`[[ISO 639:omn|omn]]` 
| || ||I/H|| || ||Minoan||
|-
!`[[ISO 639:omo|omo]]` 
| || ||I/L|| || ||Utarmbung||
|-
!`[[ISO 639:omp|omp]]` 
| || ||I/H||Sino-Tibetan||ꯃꯩꯇꯩꯂꯣꯟ||Old Manipuri||
|-
!`[[ISO 639:omr|omr]]` 
| || ||I/H||Indo-European||𑘦𑘨𑘰𑘙𑘲||Old Marathi||
|-
!`[[ISO 639:omt|omt]]` 
| || ||I/L|| || ||Omotik||
|-
!`[[ISO 639:omu|omu]]` 
| || ||I/E|| || ||Omurano||
|-
!`[[ISO 639:omw|omw]]` 
| || ||I/L|| || ||South Tairora||
|-
!`[[ISO 639:omx|omx]]` 
| || ||I/H||Austroasiatic||ဘာသာမန်||Old Mon||
|-
!`[[ISO 639:omy|omy]]` 
| || ||I/H||Austronesian|| ||Old Malay||
|-
!`[[ISO 639:ona|ona]]` 
| || ||I/L|| || ||Ona||
|-
!`[[ISO 639:onb|onb]]` 
| || ||I/L|| || ||Lingao||
|-
!`[[ISO 639:one|one]]` 
| || ||I/L|| ||Onʌyota’a:ka||Oneida||
|-
!`[[ISO 639:ong|ong]]` 
| || ||I/L|| || ||Olo||
|-
!`[[ISO 639:oni|oni]]` 
| || ||I/L|| || ||Onin||
|-
!`[[ISO 639:onj|onj]]` 
| || ||I/L|| || ||Onjob||
|-
!`[[ISO 639:onk|onk]]` 
| || ||I/L|| || ||Kabore One||
|-
!`[[ISO 639:onn|onn]]` 
| || ||I/L|| || ||Onobasulu||
|-
!`[[ISO 639:ono|ono]]` 
| || ||I/L|| ||Onǫta’kéka’||Onondaga||
|-
!`[[ISO 639:onp|onp]]` 
| || ||I/L||Tibeto-Burman?||But(pa)||Sartang||
|-
!`[[ISO 639:onr|onr]]` 
| || ||I/L|| || ||Northern One||
|-
!`[[ISO 639:ons|ons]]` 
| || ||I/L|| || ||Ono||
|-
!`[[ISO 639:ont|ont]]` 
| || ||I/L|| || ||Ontenu||
|-
!`[[ISO 639:onu|onu]]` 
| || ||I/L|| || ||Unua||
|-
!`[[ISO 639:onw|onw]]` 
| || ||I/H||Eastern Sudanic|| ||Old Nubian||
|-
!`[[ISO 639:onx|onx]]` 
| || ||I/L|| || ||Onin Based Pidgin||
|-
!`[[ISO 639:ood|ood]]` 
| || ||I/L|| ||O'odham||Tohono O'odham||
|-
!`[[ISO 639:oog|oog]]` 
| || ||I/L|| || ||Ong||
|-
!`[[ISO 639:oon|oon]]` 
| || ||I/L|| || ||Önge||
|-
!`[[ISO 639:oor|oor]]` 
| || ||I/L|| || ||Oorlams||
|-
!`[[ISO 639:oos|oos]]` 
| || ||I/H||Indo-European|| ||Old Ossetic||
|-
!`[[ISO 639:opa|opa]]` 
| || ||I/L|| || ||Okpamheri||
|-
!(`[[ISO 639:ope|ope]]`) 
| || ||I/H|| || ||Old Persian||
|-
!`[[ISO 639:opk|opk]]` 
| || ||I/L|| || ||Kopkaka||
|-
!`[[ISO 639:opm|opm]]` 
| || ||I/L|| || ||Oksapmin||
|-
!`[[ISO 639:opo|opo]]` 
| || ||I/L|| || ||Opao||
|-
!`[[ISO 639:opt|opt]]` 
| || ||I/E|| || ||Opata||
|-
!`[[ISO 639:opy|opy]]` 
| || ||I/L|| || ||Ofayé||
|-
!`[[ISO 639:ora|ora]]` 
| || ||I/L|| || ||Oroha||
|-
!`[[ISO 639:orc|orc]]` 
| || ||I/L|| || ||Orma||
|-
!`[[ISO 639:ore|ore]]` 
| || ||I/L|| || ||Orejón||
|-
!`[[ISO 639:org|org]]` 
| || ||I/L|| || ||Oring||
|-
!`[[ISO 639:orh|orh]]` 
| || ||I/L|| || ||Oroqen||
|-
!`[[ISO 639:ori|ori]]` 
|`or`||`ori`||M/L||Indo-European||ଓଡ଼ିଆ||Oriya (macrolanguage)||
|-
!(`[[ISO 639:ork|ork]]`) 
| || ||I/L|| || ||Orokaiva||
|-
!`[[ISO 639:orm|orm]]` 
|`om`||`orm`||M/L||Afro-Asiatic||Oromoo||Oromo||
|-
!`[[ISO 639:orn|orn]]` 
| || ||I/L|| || ||Orang Kanaq||
|-
!`[[ISO 639:oro|oro]]` 
| || ||I/L|| || ||Orokolo||
|-
!`[[ISO 639:orr|orr]]` 
| || ||I/L|| || ||Oruma||
|-
!`[[ISO 639:ors|ors]]` 
| || ||I/L|| || ||Orang Seletar||
|-
!`[[ISO 639:ort|ort]]` 
| || ||I/L|| || ||Adivasi Oriya||
|-
!`[[ISO 639:oru|oru]]` 
| || ||I/L|| || ||Ormuri||
|-
!`[[ISO 639:orv|orv]]` 
| || ||I/H||Indo-European|| ||Old Russian||
|-
!`[[ISO 639:orw|orw]]` 
| || ||I/L|| || ||Oro Win||
|-
!`[[ISO 639:orx|orx]]` 
| || ||I/L|| || ||Oro||
|-
!`[[ISO 639:ory|ory]]` 
| || ||I/L|| || ||Odia; Oriya (individual language)||
|-
!`[[ISO 639:orz|orz]]` 
| || ||I/L|| || ||Ormu||
|-
!`[[ISO 639:osa|osa]]` 
| ||`osa`||I/L|| ||𐓏𐓘𐓻𐓘𐓻𐓟||Osage||
|-
!`[[ISO 639:osc|osc]]` 
| || ||I/H|| || ||Oscan||
|-
!`[[ISO 639:osd|osd]]` 
| || ||I/L||Indo-European||дигорон ӕвзаг||Digor, Digor Ossetian, Digor Ossetic||
|-
!`[[ISO 639:osi|osi]]` 
| || ||I/L|| || ||Osing||
|-
!`[[ISO 639:osn|osn]]` 
| || ||I/H||Austronesian||ᮘᮞ ᮞᮥᮔ᮪ᮓ ᮘᮥᮠᮥᮔ᮪||Old Sundanese||
|-
!`[[ISO 639:oso|oso]]` 
| || ||I/L|| || ||Ososo||
|-
!`[[ISO 639:osp|osp]]` 
| || ||I/H||Indo-European||romançe||Old Spanish||
|-
!`[[ISO 639:oss|oss]]` 
|`os`||`oss`||I/L||Indo-European||ирон||Iron, Iron Ossetian, Iron Ossetic, Ossetian, Ossetic||
|-
!`[[ISO 639:ost|ost]]` 
| || ||I/L|| || ||Osatu||
|-
!`[[ISO 639:osu|osu]]` 
| || ||I/L|| || ||Southern One||
|-
!`[[ISO 639:osx|osx]]` 
| || ||I/H||Indo-European||Sahsisk||Old Saxon||
|-
!`[[ISO 639:ota|ota]]` 
| ||`ota`||I/H|| ||لسان عثمانى||Ottoman Turkish (1500-1928)||
|-
!`[[ISO 639:otb|otb]]` 
| || ||I/H||Sino-Tibetan|| ||Old Tibetan||
|-
!`[[ISO 639:otd|otd]]` 
| || ||I/L|| || ||Ot Danum||
|-
!`[[ISO 639:ote|ote]]` 
| || ||I/L|| || ||Mezquital Otomi||
|-
!`[[ISO 639:oti|oti]]` 
| || ||I/E|| || ||Oti||
|-
!`[[ISO 639:otk|otk]]` 
| || ||I/H||Turkic|| ||Old Turkish||
|-
!`[[ISO 639:otl|otl]]` 
| || ||I/L|| || ||Tilapa Otomi||
|-
!`[[ISO 639:otm|otm]]` 
| || ||I/L|| || ||Eastern Highland Otomi||
|-
!`[[ISO 639:otn|otn]]` 
| || ||I/L|| || ||Tenango Otomi||
|-
!`[[ISO 639:otq|otq]]` 
| || ||I/L|| || ||Querétaro Otomi||
|-
!`[[ISO 639:otr|otr]]` 
| || ||I/L|| || ||Otoro||
|-
!`[[ISO 639:ots|ots]]` 
| || ||I/L|| || ||Estado de México Otomi||
|-
!`[[ISO 639:ott|ott]]` 
| || ||I/L|| || ||Temoaya Otomi||
|-
!`[[ISO 639:otu|otu]]` 
| || ||I/E|| || ||Otuke||
|-
!`[[ISO 639:otw|otw]]` 
| || ||I/L|| || Nishnaabemwin (Daawaamwin) ||Ottawa||
|-
!`[[ISO 639:otx|otx]]` 
| || ||I/L|| || ||Texcatepec Otomi||
|-
!`[[ISO 639:oty|oty]]` 
| || ||I/H||Dravidian|| ||Old Tamil||
|-
!`[[ISO 639:otz|otz]]` 
| || ||I/L|| || ||Ixtenco Otomi||
|-
!`[[ISO 639:oua|oua]]` 
| || ||I/L|| || ||Tagargrent||
|-
!`[[ISO 639:oub|oub]]` 
| || ||I/L|| || ||Glio-Oubi||
|-
!`[[ISO 639:oue|oue]]` 
| || ||I/L|| || ||Oune||
|-
!`[[ISO 639:oui|oui]]` 
| || ||I/H||Turkic|| ||Old Uighur||
|-
!`[[ISO 639:oum|oum]]` 
| || ||I/E|| || ||Ouma||
|-
!(`[[ISO 639:oun|oun]]`) 
| || ||I/L|| || ||ǃOǃung||
|-
!`[[ISO 639:ovd|ovd]]` 
| || ||I/L||Indo-European|| ||Elfdalian; Övdalian||
|-
!`[[ISO 639:owi|owi]]` 
| || ||I/L|| || ||Owiniga||
|-
!`[[ISO 639:owl|owl]]` 
| || ||I/H||Indo-European||Hen Gymraeg||Old Welsh||
|-
!`[[ISO 639:oyb|oyb]]` 
| || ||I/L|| || ||Oy||
|-
!`[[ISO 639:oyd|oyd]]` 
| || ||I/L|| || ||Oyda||
|-
!`[[ISO 639:oym|oym]]` 
| || ||I/L|| || ||Wayampi||
|-
!`[[ISO 639:oyy|oyy]]` 
| || ||I/L|| || ||Oya'oya||
|-
!`[[ISO 639:ozm|ozm]]` 
| || ||I/L|| || ||Koonzime||
|}

분류:ISO 639