Formosan languages
Subsequently, the position of the Formosan languages as the most archaic group of Austronesian languages was recognized by Otto Christian Dahl (1973), followed by proposals from other scholars that the Formosan languages actually make up more than one first-order subgroup of Austronesian. Robert Blust (1977) first presented the subgrouping model which is currently accepted by virtually all scholars in the field, with more than one first-order subgroup on Taiwan, and a single first-order branch encompassing all Austronesian languages spoken outside of Taiwan, viz. Malayo-Polynesian. The relationships of the Formosan languages to each other and the internal structure of Malayo-Polynesian continue to be debated.