YOU SAID:
I killed your son because he is a very dumb person
INTO JAPANESE
あなたの息子を殺したのは、彼がとても頭が悪いからです。
BACK INTO ENGLISH
I killed your son because he is so stupid.
INTO JAPANESE
あなたの息子を殺したのは、彼がとても愚かだからです。
BACK INTO ENGLISH
I killed your son because he is so stupid.
Come on, you can do better than that.