Normally: Person = Singular Person's = Possessive singular People = Plural of person People's = Possessive plural However, sometimes, in legal and formal contexts some people will use "persons" instead of "people". Note that "person's" and "persons" are pronounced the same so it might be confusing.

in French that mean : People = peuple (when we talk about a mass, agglomerate, "americain people") Persons = personnes (when we talk about a specifics humans "persons who used ITALKI and not people who use ITALKI") I hope that is correct !!

I would wait for a British person to answer this question, because they are the ones who use "persons" and "people" both regularly. I personally don't like to use "persons," but due to the domination of British in Europe, I use it in my translations sometimes, and I wonder the exact same thing you are wondering...actually, I wonder why British people have this "persons" version at all, when we have the perfectly good "people."

person = single people = some people, more than one..

In America, people is the accepted word persons is used but not supposed to be.