YOU SAID:
I am the best person to ever walk on the planet
INTO JAPANESE
私はこれまで地球上を歩いた中で最高の人間です
BACK INTO ENGLISH
I'm the best human being to ever walk the earth
INTO JAPANESE
私はこれまで地球を歩いた中で最高の人間です
BACK INTO ENGLISH
I'm the best human being to ever walk the earth
That didn't even make that much sense in English.