Yes, I know, it's not officially supported but I gave it a try. Parallels Tolls installed ok with Parallels Desktop 16 and everything looks good except the fact I cannot switch languages. Standard combination I use in macOS and Windows 10 doesn't work and I cannot change default Super+space combo for when I try to nothing happens. New combo is just not registered. Is there any way to register Ctrl+Space for this action?
UPD: Cmd+Shift+Space seems to work but it feels awkward to use. Still need a way to change the combo. There's the same problem with officially supported 18.04.
20.04. I managed to make CTRL+SHIFT combination work with GNOME Settings app. However there's still no option to make it ALT+SPACE combo I use with macOS.