Others said a lot already. But yes, go full on English for all official and business needs. Endure a few years of hardship and everyone will come out stronger.

Others said a lot already. But yes, go full on English for all official and business needs. Endure a few years of hardship and everyone will come out stronger. Europe can attract so much top talents over night just by this one single step and also save an insane amount of money/resources that can be directed elsewhere.