YOU SAID:
A sword mustn’t be unsheathed without proper purpose.
INTO JAPANESE
適切な目的もなく剣を抜いてはならない。
BACK INTO ENGLISH
Do not draw your sword without a proper purpose.
INTO JAPANESE
正当な目的もなく剣を抜いてはいけません。
BACK INTO ENGLISH
Do not draw your sword without a good purpose.
INTO JAPANESE
正当な目的もなく剣を抜いてはいけない。
BACK INTO ENGLISH
Do not draw your sword without a good purpose.
That didn't even make that much sense in English.