How do you say A fake, or a fraud, or a lair, anything like that in any language other than English?

How do you say anything like, regarding a person, A fake, fraud, liar, deceiver... Someone who isnt what they seem, and has, let's say, a secret life. Anything like that. Someone who isnt who you think they are. Do you know any words to describe that...in a language other than English? Thanks!