oh please, there are different types of English; albeit, American, British, Australian, etc.
Just because one word is used differently in one variation, it doesn't get invalidated.
https://www.grammarly.com/blog/persons-people-peoples/
don't be a retard, use your common sense; if people is a plural for "person" or individual human beings - meaning a group of individuals, peoples is the plural of people - referring to the various groups of the individuals.
Also it's not a prison-slang. Or what, are you saying that Australia is a prison because it used to be a Penal Colony for British criminals in the past?
Damn doe, you're a fucking racist ngl.