If I wanna say that for example "people (in general) sleep at this hour", what will be the right choise?
Leute schlafen um diese Zeit
Man schläft um diese Zeit
When is man the right choise and when Leute?
German Language Stack Exchange is a bilingual question and answer site for speakers of all levels who want to share and increase their knowledge of the German language. It's 100% free, no registration required.Sign up to join this community
If you don't use the definite article, it's some people, if you use it, it's a group of people in question.
Leute schlafen um diese Zeit.
Some people sleep at this hour.
Die Leute schlafen um diese Zeit.
These people sleep at this hour.
If you want to say people in general you have to write out this in general as die meisten.
Die meisten Leute schlafen um diese Zeit.
(Most) people sleep at this hour.
If you use man instead and address someone, you make it a rather harsh admonishment:
Man schläft um diese Zeit.
One sleeps at this hour. (so you should, too)