YOU SAID:
I am the dumbest person in the entire world
INTO JAPANESE
私は全世界で最も愚かな人です
BACK INTO ENGLISH
i am the stupidest person in the whole world
INTO JAPANESE
私は全世界で最も愚かな人です
BACK INTO ENGLISH
i am the stupidest person in the whole world
That didn't even make that much sense in English.