Person on people?
As duas palavras traduzem "pessoa", eu posso usar qualquer uma? Qual seria a correta forma de aplicação?

Question

Answer

We use normally use 'person'  for one and people for more than one.

Hope this helps

Bob

Answer

People = pessoas (plural)
Person = pessoa (singular)

One person. Two people.

Hope that helps. =]

Answer

Person - persona (1 man or 1 woman)
People - gente (a group of persons) 
Por ejemplo:
Chinese people are so good - La gente china es muy buena 
Fabio es una persona inteligente - Fabio is an intelligent person.

I hope it helps, if you have any questions more, feel free to ask me. 
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Have a nice night.