YOU SAID:

is japanese the only working lanuge

INTO JAPANESE

日本語は唯一の作業言語です

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Japanese is the only working language

INTO JAPANESE

日本語が唯一の使用言語です

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Japanese is the only language used

INTO JAPANESE

使用されている言語は日本語のみです

BACK INTO ENGLISH

The only language used is Japanese

INTO JAPANESE

使用される言語は日本語のみです

BACK INTO ENGLISH

The only language used is Japanese