YOU SAID:

Murder her, it'll be fun

INTO JAPANESE

彼女を殺して、それは楽しいでしょう

BACK INTO ENGLISH

Kill her and it will be fun

INTO JAPANESE

彼女を殺すとそれは楽しいでしょう

BACK INTO ENGLISH

It would be fun to kill her

INTO JAPANESE

彼女を殺すのは楽しいだろう

BACK INTO ENGLISH

It would be fun to kill her