The languages of the Raja Ampat Islands show a strong Papuansubstratum influence; it is not clear that they are actually Austronesian as opposed to relexified Papuan languages.[1]
Remijsen (2001) and Blust (1978) linked the languages of Raja Ampat to the South Halmahera languages. David Kamholz (2014) breaks up Raja Ampat, so that the structure of the Halmahera Sea languages is as follows:[2]