There are over 52 languages spoken, all of them (except Chinese and Indians) belong to the Nuclear Malayo-Polynesian sub-branch of Malayo-Polynesian which in turn is a branch of the Austronesian language family.
There are over 52 languages spoken, all of them belong to Austronesian language family (except Chinese and Indians). All Languages of Sumatra belong to the Nuclear Malayo-Polynesian sub-branch of Malayo-Polynesian which in turn is a branch of the Austronesian language family.