The Atayalic languages are a group of Formosan languages spoken in northern Taiwan. Robert Blust considers them to form a primary branch within the Austronesian language family, However, Paul Jen-kuei Li groups them into the Northern Formosan branch, which includes the Northwestern Formosan languages.

Li (1981) and Li (1982) classify the Atayalic languages and dialects as follows:^[1]

The Proto-Atayalic language was reconstructed by Taiwanese linguist Paul Jen-kuei Li in 1981.^[1] Proto-Atayalic had final voiced stops, which are preserved in the Mayrinax dialect of Cʔuliʔ Atayal.^[2] These voiced stops include *-b, *-d, *-g, and *-g'. However, they are now lost in many dialects of Atayal, Seediq, and also Pazeh (Blust 2009:615).