Thank you for your help, I solved by switching to "US (Asia Server)" which supports all my devices and keep the interface friendly according to a western point of view.
What I learned is that the data, about my house and devices is stored separately on each server, and if you switch server you lose your settings and historical data.
Xiaomi is still the best brand, by far, among all the Chinese ones, but has not yet the strategic thinking and customer satisfaction that Apple or Google can offer.
For example:
Why not retain all the data in a central server? Data is gold. Moreover if data is lost, the Client has no incentive to stay with your ecosystem.
You have a jump start and a first mover competitive advantage on home automation: if you don't create a standard, the products are not interoperable, and Client are not valued, you will lose your position quickly.
Why not all the products are compatible with each other? Internet is full of Clients lost because they do not know which gateway to pair with or to buy.
Why support only certain products in certain countries? A Client can buy this product in my country and then discover that is not supported. That is not a good customer experience.
I don't want to be critic, I just hope that Xiaomi correct its way and grows.
At least in my country, Xiaomi would have the potential to become the leader, for smartphone and home automation, if only...