YOU SAID:
A good person can do nothing wrong
INTO JAPANESE
善良な人は何も悪いことはできない
BACK INTO ENGLISH
A good person cannot do anything wrong
INTO JAPANESE
善良な人は何も悪いことはできません
BACK INTO ENGLISH
A good person can't do anything bad
INTO JAPANESE
良い人は悪いことをすることはできません
BACK INTO ENGLISH
Good people can't do bad
INTO JAPANESE
良い人は悪いことはできません
BACK INTO ENGLISH
Good people can't be bad
INTO JAPANESE
良い人は悪くない
BACK INTO ENGLISH
Good person is not bad
INTO JAPANESE
いい人は悪くない
BACK INTO ENGLISH
Good person is not bad
That didn't even make that much sense in English.