YOU SAID:

I am the worlds smartest person ever to exist

INTO JAPANESE

私はこれまで存在した世界で最も賢い人間です

BACK INTO ENGLISH

I'm the smartest person in the world that has ever existed.

INTO JAPANESE

私はこれまで存在した世界で最も賢い人間です。

BACK INTO ENGLISH

I'm the smartest person in the world that has ever existed.