The trick still works, but the parent key has been removed (probably migrated to gsettings). You need to create the Boolean key /desktop/gnome/peripherals/keyboard/indicator/showFlags and set it to true.
The trick still works, but the parent key has been removed (probably migrated to gsettings). You need to create the Boolean key /desktop/ gnome/periphera ls/keyboard/ indicator/ showFlags and set it to true.