

Judging by the number of suggestions and corrections, this reminds me of one of those maps that manage to trigger everyone in some way. Also, goes to show that translating is hard.
Here’s an idea though. Make a “buy European” translation post in every European language specific community out there. Explain the core message of “buy European” in a a few sentences. Explain what the feeling, emotion and atmosphere would ideally be. Should be it be a command, recommendation, encouragement or something else. Ask which option fits best in that linguistic, historical and cultural context. Collect some options from the discussion. Make a poll etc.
Used to see lots of those on Reddit, but I’m not touching that place again.
Usually, it was a map of Europe with the favorite food, national animal or whatever of each country. In the comments you could read about all the mistakes of that map. People would disagree about the favorite food, claim that it only applies to certain part of their country, find out that they even have a national bird, claim that the national bird was changed and the map has been outdated for 30 years etc. It was a wild ride pretty much every time.