Apple TV new
I started the Apple TV and mistakenly select German how do I get back to the menu to select English?
Safari-OTHER, OS X Mavericks (10.9.5)
Operating system language selection is at: Settings app > General > Language And Region > Apple TV Language. Even though the menus are now in German you should be able to navigate to the right setting by following the above path.
Otherwise, you'll have to completely reinstall tvOS, which is much more complicated.