'Cycle through windows'

You can check which key command it is for your language by switching to Finder, then look at the Window menu for 'Cycle through windows'...

Add the native option for "Command + `" this is 'Cycle through windows' since it only works when the keyboard is in US layout.


Edit: Apparently it's aslo called "Move focus to next window"

This would be very nice because the current "move focus to next window" only works on the current space. not across spaces.