Citrix regional settings

We have a citrix farm at our site. One of the servers is for working with polish customers, so the regional settings for users on this server must be Polish, the rest of the servers have German regional settings.

At the moment, our IT staff is setting the regional settings at login. This means that you only get polish settings, if you login to the polish server twice because you have to relog for regional setting changes to take effect. This is acceptable as a workaround, but I find it hard to believe that this is the preferred way to do this. I don't think I can logically explain to our customers that they have to login twice when switching between German and Polish logins.

So, does anyone have any experiences with citrix servers with different regional settings ?