YOU SAID:
the assassin had a vendetta against the frivolous king
INTO JAPANESE
暗殺者は軽薄な王に対して復讐をしました
BACK INTO ENGLISH
The assassin took revenge against the frivolous king
INTO JAPANESE
暗殺者は軽薄な王に復讐した
BACK INTO ENGLISH
The assassin took revenge on the frivolous king
INTO JAPANESE
暗殺者は軽薄な王に復讐した
BACK INTO ENGLISH
The assassin took revenge on the frivolous king
You've done this before, haven't you.