YOU SAID:
I want to kill you in your sleep
INTO JAPANESE
あなたの睡眠中にあなたを殺したい
BACK INTO ENGLISH
I want to kill you during your sleep
INTO JAPANESE
私はあなたの睡眠中にあなたを殺したい
BACK INTO ENGLISH
I want to kill you during your sleep
That didn't even make that much sense in English.