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Li and Tsuchida (2009) lists various fossilized reflexes of Proto-Austronesian infixes *-al-, *-aR-, and *-aN- in all major Formosan languages as well as Tagalog and Javanese.
The Austronesian languages are widely spread across the globe, as far west as Malagasy in Madagascar, as far east as Rapa Nui on Easter Island, and as far as north as the Formosan languages of Taiwan.
The Thao/Ngan language is classified as a Paiwanic language, and a Formosan language which is a geographical subgroup of the much larger Austronesian language family.