Bai-Maclay
Bai-Maclay是核心跨新几内亚语系的一种语言，过去分布在巴布亚新几内亚，现已消亡。
Dumun is an endangered Madang language spoken in Madang Province, Papua New Guinea.
Dumun is reported to go by the name Bai, but evidently this is a distinct (though related) language, or at least a variety called Bai recorded by Maclay was distinct.
摘自英文维基百科 · Dumun language · CC BY-SA 4.0