We shall wonder about the how many people. This is called the "singular they" and it has been a feature of English for hundreds of years.

https://en.wikipedia.org/wiki/Singular_they

Yes, I'm sure almost everyone reading this was already aware. This doesn't mean that "they are pretty. they are clever. they are ugly. they are good." is a good localization of "ő csinos. ő okos. ő csúnya. ő jó."