An empirical study on adaption of Standard Japanese sound in two-pattern dialects of Kyushu Japanese

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In two-pattern dialects of Kyushu Japanese, loanwords form a different category from compounds in regard to sound adaptation from Standard Japanese. For loanwords, phonetic feature of Standard Japanese determines tone in dialects. On the other hand, tone of compounds depends on a tonal type and mora length of former element of compounds. We, however, found that compounds which contain deaccented morphemes in Standard Japanese are also deaccented in a dialect. Thus, sound system of dialects is affected gradually by sounds of Standard Japanese.