I think the winning move would be to establish English as the second official language. Hell, the EU should adopt English as the main language. I believe one of the growth factors of many Eastern and Central European countries is the widespread proficiency in it. I was impressed to find many interviews of Estonian politicians speaking it fluently.
(I'm not a native speaker and I've never nor do I currently live in an English speaking country, I just think this is the best and most practical way to start decreasing fragmentation in the EU market).
(I'm not a native speaker and I've never nor do I currently live in an English speaking country, I just think this is the best and most practical way to start decreasing fragmentation in the EU market).