Again, being proficient in English or in the radiotelephony language used in the country of flight, as per FCL.055, does not equate to "[English being] mandator

Again, being proficient in English or in the radiotelephony language used in the country of flight, as per FCL.055, does not equate to "[English being] mandatory for all pilots at least in EASA and FAA", as you said. I could very well fly x-country from France to Germany if I am aeronautically proficient in both countries' languages, yet not being so in English. > But many other CAAs will not issue licenses like that (...) I know for a fact that they do in Spain, France, Germany, and Finland.