Editing Index of language articles (section)

==O==
{{compactTOC8|side=yes}}
|-
| [[Occitan language|Occitan]] or Provençal || [[Romance languages|Romance]]
|-
| [[Odia language|Odia]] || [[Indo-Aryan languages|Indo-Aryan]]
|-
| [[Ojibwe language|Ojibwe]], Ojibwa, or Chippewa || [[Algonquian languages|Algonquian]]
|-
| [[Okinawan language|Okinawan]] || [[Japonic languages|Japonic]]
|-
| [[Oko-Juwoi language|Oko-Juwoi]] || [[Great Andamanese languages|Great Andamanese]]
|-
| [[Omagua language|Omagua]] || [[Tupian languages|Tupian]]
|-
| [[Omok language|Omok]] || [[Yukaghir languages|Yukaghir]]
|-
| [[Ongota language|Ongota]] || [[Afroasiatic languages|Afroasiatic]]
|-
| [[Oʼodham language|O'odham]] || [[Uto-Aztecan languages|Uto-Aztecan]]
|-
| [[Ormuri language|Ormuri]] || [[Iranian languages|Iranian]]
|-
| [[Oroch language|Oroch]] || [[Tungusic languages|Tungusic]]
|-
| [[Orok language|Orok]] || [[Tungusic languages|Tungusic]]
|-
| [[Oromo language|Oromo]] or Afaan Oromoo || [[Cushitic languages|Cushitic]]
|-
| [[Ossetic language|Ossetic]] or Ossetian || [[Iranian languages|Iranian]]
|-
|colspan="2"|