YOU SAID:
I'm gonna kill that kid
INTO JAPANESE
あの子を殺してやる
BACK INTO ENGLISH
I'm going to kill him
INTO JAPANESE
私は彼を殺すつもりです
BACK INTO ENGLISH
i am going to kill him
INTO JAPANESE
私は彼を殺すつもりです
BACK INTO ENGLISH
i am going to kill him
That didn't even make that much sense in English.