YOU SAID:
my dog is the dumbiest dog on this planet
INTO JAPANESE
私の犬はこの地球上で最も馬鹿な犬です
BACK INTO ENGLISH
My dog is the most stupid dog on this planet
INTO JAPANESE
私の犬はこの地球上で最も愚かな犬です
BACK INTO ENGLISH
My dog is the stupidest dog on this planet
INTO JAPANESE
私の犬はこの地球上で最も愚かな犬です
BACK INTO ENGLISH
My dog is the stupidest dog on this planet
You've done this before, haven't you.