We (Canadians) actually have two layouts to type French characters. The modern Canadian multilingual layout, and the traditional “French (Canada)” layout. As an older French speaking Canadian, I prefer the traditional layout but both work. You can even type English words with these.
AFAIK Kodi can use pulseaudio and probably pipewire. I use Kodi too on those computers and I just leave it to use the default PA device that I’ve set. I switch the default devices with pasystray.
What’s usually breaking for me is paprefs. Every so often after an upgrade, the options are greyed out and I can’t share or access my devices over the network.
I never tried to setup simultaneous output before because I just switch from device one to another, but I just enabled it in paprefs and it’s working too.