YOU SAID:
hello you useless fool
INTO JAPANESE
こんにちは、あなたは無用なばかだ
BACK INTO ENGLISH
Hello, you are a useless idiot
INTO JAPANESE
こんにちは、あなたは役に立たないばかです
BACK INTO ENGLISH
Hello, you are a useless idiot
That didn't even make that much sense in English.