That yellow banner is displayed to admins. The language issue is a known bug: Unable to change the language for administrative access banner
As mentioned in the Atlassian Bug Fixing Policy:
Developers responsible for fixing bugs also monitor comments on existing and new bugs, so you can comment to provide feedback if you need to.
Please comment and vote on the bug report to provide more feedback.
Hello Community, Jessica here from the Confluence product marketing team! Today I wanted to get your takes on project planning –– what works, what doesn’t, how do you know if you’re doing it r...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs