Who are you to say what's knowledge and what's not? Why can't I, a speaker in language X, buy books in that language outside of the country where this language

Who are you to say what's knowledge and what's not? Why can't I, a speaker in language X, buy books in that language outside of the country where this language is spoken on the same platform where it's sold. See e.g. availability of, say, Japanese or Russian books on Apple Books in Europe, US, Russia and Japan.