Does the word "peoples" exist, and if so, when do you use it? [duplicate]
Solution 1:
This is an entry from OALD online:
3 [countable] all the persons who live in a particular place or belong to a particular country, race, etc
the French people
the native peoples of Siberia
So, when used in this sense, the word "people" has a plural form and it is grammatically correct.