Ratsua is an

Austronesian language The Austronesian languages ( ) are a language family widely spoken throughout Maritime Southeast Asia, parts of Mainland Southeast Asia, Madagascar, the islands of the Pacific Ocean and Taiwan (by Taiwanese indigenous peoples). They are spoken b ...

of Bougainville,

Papua New Guinea Papua New Guinea, officially the Independent State of Papua New Guinea, is an island country in Oceania that comprises the eastern half of the island of New Guinea and offshore islands in Melanesia, a region of the southwestern Pacific Ocean n ...

References

Northwest Solomonic languages Languages of Papua New Guinea Languages of the Autonomous Region of Bougainville {{MesoMelanesian-lang-stub