

15·
2 months agoRarely in Europe.
If there is the Football World Cup or Euro Cup, you will see flags in European Cities and People wearing them are not uncommon.
During a random Tuesday, this is very uncommon as people tend to remember in which country they live without having to be reminded.
If you have a good relationship with your brother, there is no problem.
Surely, he will understand, maybe even without directly telling him your motives.
Wishing you all the best and many great memories. Life throws them your way when you let it happen.