YOU SAID:
thou shall not be unfaithful
INTO JAPANESE
あなたは不誠実であってはなりません
BACK INTO ENGLISH
you must not be dishonest
INTO JAPANESE
不誠実であってはなりません
BACK INTO ENGLISH
must not be dishonest
INTO JAPANESE
不正であってはなりません
BACK INTO ENGLISH
must not be fraudulent
INTO JAPANESE
詐欺的であってはなりません
BACK INTO ENGLISH
Must not be fraudulent
INTO JAPANESE
詐欺行為であってはなりません
BACK INTO ENGLISH
Must not be fraudulent
That didn't even make that much sense in English.