A comprehensive study on the theoretical basis of role languages

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Role language (yakuwarigo) is defined as sets of spoken language features (e.g., vocabulary and grammar) and phonetic characteristics (e.g., intonation and accent patterns) associated with particular character types. Throughout the funding period, this study investigated five research questions : (a) the theoretical basis of role language ; (b) the process of children's acquisition of role language ; (c) descriptions of and the historical origins of role language varieties in Japanese ; (d) cross-linguistic analyses of role language between Japanese and foreign languages ; and (e) the educational applications of role language study. The main findings are as follows : the formation of role language is based on social attributes, and by the age of five, children had already acquired knowledge of role language.