Thanks for your effort to improve Xubuntu by reporting this observation! However, I suspect that it's a misconception...
The "en_US" label you see at the top bar of the login screen is the display language, which I see from the attached ProcEnviron.txt that you set to English. Actually it's a language chooser indicator, so if you click it you see a list of installed translations, and you have the option that way to control the display language of the session you are about to start.
Hi Bernhard,
Thanks for your effort to improve Xubuntu by reporting this observation! However, I suspect that it's a misconception...
The "en_US" label you see at the top bar of the login screen is the display language, which I see from the attached ProcEnviron.txt that you set to English. Actually it's a language chooser indicator, so if you click it you see a list of installed translations, and you have the option that way to control the display language of the session you are about to start.