Favorlang is an extinct Formosan language closely related to Babuza.
Although Favorlang is considered by Taiwanese linguist Paul Jen-kuei Li to be a separate language, it is nevertheless very closely related to Babuza.
[1] Alternatively, Favorlang may also have represented a dialect of Babuza at an earlier stage, since Favorlang was documented in the mid-17th century, while Babuza was documented only around the turn of the 20th century by Japanese linguists.
Except for the *t, *s, *Z > /t/ merger, all of these sound changes are shared by the five Western Plains languages Taokas, Babuza, Papora, Hoanya, and Thao.
All genitive pronouns end with -a. Namoa tamau tamasea paḡa de boesum, Ipádassa joa naan.