YOU SAID:

You will not be forgotten, brother.

INTO JAPANESE

あなたが忘れてはならない、弟。

BACK INTO ENGLISH

My brother don't you forget.

INTO JAPANESE

私の兄はあなたを忘れます。

BACK INTO ENGLISH

You forget about my brother.

INTO JAPANESE

あなたは私の兄弟を忘れる。

BACK INTO ENGLISH

You forget about my brother.