Another possible solution is to define a compose key (I use SysRq) to type characters not on the keyboard, such that (for example) the three-key sequence "SysRq

Another possible solution is to define a compose key (I use SysRq) to type characters not on the keyboard, such that (for example) the three-key sequence "SysRq . Z" is Ż. Here's the XCompose file I use: https://github.com/kragen/xcompose https://github.com/kragen/xcompose