YOU SAID:

do they only translate into japanese

INTO JAPANESE

彼らは日本にのみ翻訳を行う

BACK INTO ENGLISH

They do a translation only in Japan

INTO JAPANESE

彼らは日本国内でのみの翻訳を行う

BACK INTO ENGLISH

They do only translator in Japan

INTO JAPANESE

彼らは日本で翻訳のみを行う

BACK INTO ENGLISH

They only translate in Japan

INTO JAPANESE

日本でのみ翻訳しています

BACK INTO ENGLISH

I translate only in Japan

INTO JAPANESE

私は日本でのみ翻訳しています

BACK INTO ENGLISH

I translate only in Japan