Oino was a language spoken in Osa Nara. It is a language isolate, meaning that researchers cannot find any demonstrable genealogical (or “genetic”) relationship with other languages.

Due to that fact and also due to the historic circumstances of Osa Nara being conquered by the Kareden in the end of 18th CSR, the knowledge of oino was lost, with no documented native speakers already by the middle of the 19th CSR. The amount of historic artifacts uncovered to this day is inefficient to reconstruct the full vocabulary and grammar of the written oino, and there are still many unanswered questions.

Oino is itself a word in Oino and means “all the conversations”.