YOU SAID:

i am monkey d Luffy who is gonna be king of the Pirates

INTO JAPANESE

私は海賊王になるモンキー・d・ルフィです

BACK INTO ENGLISH

I am Monkey D. Luffy, who will become the Pirate King.

INTO JAPANESE

わたしは海賊王になるモンキー・D・ルフィだ。

BACK INTO ENGLISH

I am Monkey D. Luffy, who will become the Pirate King.