Polish, as I understand it

 ♀♀They / Them nominative one genitive ich / nich dative im / nim accusative je / nie instrumental nimi locative nich Gen Ona  ich  potrzebuje               To  ich  samochód                Nie lubię  ich  brata              To  dla   nich Dative Daj  im  torbę                       Powiedziała  im                    Dzięki  nim Kupuje  im  piwo                Życzę  im ... Zapłaciła  im Accusative Ona  je  lubi                          Idż po  nie Ona  je  widziała      ...

These days, one  as a pronoun, tends to be avoided by the English masses, perhaps because it is viewed as sounding pretentious, but for most people it has been replaced by y ou  without much confusion when in context. A Polish friend once told me there is no direct equivalent to one in Polish.  I assume the Polish don't literally say, for example, where do you buy books  (when meaning where does one buy books) which would be Gdzie kupujesz książki?   Which I believe only means, where does the person you are asking buy books?  So, if that's no good and we can't ask where does one buy books?  then a different phrasing is required. Where are books bought?  Typed into Google Translate comes up with Gdzie kupuje się książki?  kupuje is conjugated as for the third person, as you would for one as a pronoun How is bread made? Jak się robi chleb? again, robi is the conjugation for the third person and się pops up again So się acts lik...