YOU SAID:
my siblings need to stop fighting with one another
INTO JAPANESE
私の兄弟は互いに喧嘩をやめなければならない
BACK INTO ENGLISH
my brothers have to stop fighting with each other
INTO JAPANESE
私の兄弟は互いに争うのをやめなければならない
BACK INTO ENGLISH
my brothers have to stop fighting each other
INTO JAPANESE
私の兄弟は互いに争うのをやめなければならない
BACK INTO ENGLISH
my brothers have to stop fighting each other
You've done this before, haven't you.