Yeah, a more appropriate and useful translation for it would be person
"Person" is the main translation, "man" was deleted, probably after alidavid13's comment.
not these crazy sentences again! can I put person ? as human just sounds weird
Yes, person is the main answer.
How does it come that SHE is a MAN?
Well, English often uses "man" when it means "a human being"... but it's true that sounds really... wrong.
Are the two following sentences equivalent?
1. Ona jest złym człowiekiem.
2. Ona jest złą osobą.
I'm a little confused about "osoba" and "człowiek" both meaning "person"...
Generally "człowiek" means "human", but I would say that we use those words differently than English does. You may take a look here: https://www.duolingo.com/comment/19428542
Would człowiek fall under masculine personal here?