YOU SAID:

one day i will find out who killed my mother and kill them themself

INTO JAPANESE

ある日、私は私の母を殺した人を見つけて、彼ら自身を殺すでしょう

BACK INTO ENGLISH

One day I'll find the person who killed my mother and kill themselves

INTO JAPANESE

ある日、私は母を殺し、自殺した人を見つけるでしょう

BACK INTO ENGLISH

One day I'll find someone who killed my mother and committed suicide

INTO JAPANESE

ある日、私は母を殺し、自殺した人を見つけるでしょう

BACK INTO ENGLISH

One day I'll find someone who killed my mother and committed suicide