YOU SAID:
i will never forget what you've done to me
INTO JAPANESE
あなたは私にやったことを決して忘れない
BACK INTO ENGLISH
You never forget what you did to me
INTO JAPANESE
あなたは、私にしたことを決して忘れない
BACK INTO ENGLISH
You will never forget me.
INTO JAPANESE
私は決して忘れないでしょう。
BACK INTO ENGLISH
I will never forget.
INTO JAPANESE
나는 결고 널 잊을 수 없어
BACK INTO ENGLISH
i will never forget you
INTO JAPANESE
나는 결고 널 잊을 수 없어
BACK INTO ENGLISH
i will never forget you
That didn't even make that much sense in English.