Interesting note: In english, the word 'people' is plural, where is Italian, and possibly other Latin-based languages, it is singular. I believe, although I don't remember the exact definate article, that 'people' in German is also singular. As I remember Italian better than the others, I shall shew what I mean with that language:
il popolo= people, il being a masculine singular definate article.
i popoli= peoples i is a masculine plural def. article. This word refering mainly to different kinds of people from different places. i.e. people from Germany and people from Sweden would be refered to as peoples.
il persone= person, sing.
i personi= persons, plural. This can be seen as 'people', but it slightly different, as shewn above.
*NB: This is how I've come to understand the language, it may not be exactly as translated, or have a slightly different meaning. This is just a general view.