look, i loved Chekoslovakia back in the days, and now love Czechia and Slovakia.... if a Czech person prefers to hear Czech Republic, i will say "Czech Republic"... it's your country (but Czechia is a legit name, and so is Chechian by grammar)....ne konce sveta! "Czech" it isIn the first article you attached it says “it is recommended to use a one-word in foreign languages, if it is not necessary to use the formal name of the country.” So that sort of confirms what I am saying. The formal name remain the Czech Republic. But thank you for enclosing the link.
I didn’t even bother to read through the others then.