YOU SAID:

I am a cat who kill someone

INTO JAPANESE

私は誰かを殺す猫

BACK INTO ENGLISH

I'm a cat to kill someone

INTO JAPANESE

私は誰かを殺すために猫

BACK INTO ENGLISH

Someone to kill my cat

INTO JAPANESE

誰か私の猫を殺すために

BACK INTO ENGLISH

To kill my cat

INTO JAPANESE

私の猫を殺すために

BACK INTO ENGLISH

To kill my cat