The title pretty much explains the problem. Previously, with XFCE, using the keyboard shortcut I had set in the settings manager had changed keyboard layouts on a per-vm basis, but now that Im on KDE it seems like I have no way to change keyboard layout outside of the Qube Manager.
Either a fix on how to do this through KDE or the commands that Id need to do to write my own scripts to change keyboard layouts would be wonderful 
Thanks ahead of time for the help!
The problem persists for KDE now (4.3). Does anyone know a solution to make Alt + Shift a permanent function in an appVM? After rebooting appVM it stops working again, even though the settings haven’t changed. @alimirjamali or someone KDE users, please help 
I also noticed that if I run sudo thunar in terminal, Alt + Shift working again 
Hi. To clarify, KDE Wayland or KDE X11?
default KDE desktop x11 from KDE (desktop environment) — Qubes OS Documentation
It seems that when I enable second keyboard layout in dom0 before start appVM, switching Alt-Shift works in appVMs (but I’m not sure - it didn’t work in one of appVMs). I still don’t understand the pattern of how this works 