This is the typical divisive non factual rubbish that got us into this Brexit mess in the first place. Tons of Brits flying for easyJet all over Europe, FACT. Getting a job in BA (or easyJet for that matter) without a high level of english is impossible. Likewise you cannot work for lufthansa if you don't speak german. I am not sure how is it any harder (or unfair) for a Brit to learn another language than for a non Brit to learn english.
"To me, it seems a dreadful indignity to have a soul controlled by geography."