Yilan Creole Japanese

Yilan Creole Japanese is a Japanese-based creole of Taiwan. It arose in the 1930s and 1940s, with contact between Japanese colonists and the native Atayal people of southern Yilan County, Taiwan. The vocabulary of a speaker born in 1974 was 70% Japanese and 30% Atayal, but the grammar of the creole does not closely resemble either of the source languages.

Yilan Creole is mutually unintelligible with both Japanese and Atayal. The creole was identified in 2006 by Chien Yuehchen and Sanada Shinji, but its existence is still largely unknown. It was named by Sanada and Chien for its location. The official language of Taiwan, Mandarin, threatens the existence of Yilan Creole.