"but I havent see a flag for Bavaria in Chess !"
This is the point you are missing. Chess.com doesn't draw political boundaries, it merely tries to represent various peoples who have a voice. I'm sure if enough Bavarians made a good enough case for a flag, it would be considered for inclusion. This is a chess site, not the United Nations.
Then please make a Union Jack for me !!!



Please could an administrator explain why Catalonia is registered like a country in the chess profile ?
...
we aren't an official repository for defining countries or nations.
we allow people to choose their identity and offer as many options as reasonable. sometimes this causes problems when there are disputed countries. but we aren't picking sides - we're a chess site trying to make people happy. we encourage people to resolve their differences in the appropriate political venues, not on our site.
enjoy!