Bukar–Sadong is an Austronesian language mainly spoken by

Bidayuh Bidayuh is the collective name for several indigenous groups found in southern Sarawak, Malaysia and northern West Kalimantan, Indonesia, on the island of Borneo, which are broadly similar in language and culture (see also #Language issues, is ...

people in Sarawak but also in bordering regions of West Kalimantan, Indonesia. McGinn (2009) proposes that it is the closest relative of the divergent Rejang language of Sumatra.McGinn, Richard (2009) "Out-of-Borneo subgrouping hypothesis for Rejang". In Adelaar & Pawley, eds, ''Austronesian historical linguistics and culture history''

References

Languages of Indonesia Languages of Malaysia Land Dayak languages {{au-lang-stub