琉球王朝の公用語は、中国語。 https://www.mofa.go.jp/mofaj/annai/honsho/shiryo/akebono/03.html 琉米修好条約Convention between the Lew Chew Islands and the United States of Americahttps://en.wikisource.org/wiki/Convention_between_the_Lew_Che…