It is shame, but not on you, that in some countries, fluency in English is expected from non-native speakers by their fellow citizens (from employers to university administrations). What a professional should do is trying to be best at their professions, not knowing English as native-speakers do. Being fluent would be an asset for an English teacher or a must for a simultaneous translator, but, for a doctor for instance, being good at medicine should be what really matters, not fluency in English. I am aware that what I think would be of no help to you, because this is neither what you expected to hear nor what the real world conditions require from you to do.
But those real world conditions or those so-called job-requirements are sometimes nothing but hypes. If you are the best or one of the bests at what you are doing, no one's going to question your sufficiency in English.