Ctrl -C, Ctrl -V not working in different keyboard layout

As said above this is a known bug, however there is a simple fix shown here:

https://gist.github.com/d3zorg/3f71ee24b1a0a288ce27

sudo add-apt-repository ppa:attente/java-non-latin-shortcuts
sudo apt-get update
sudo apt-get upgrade
restart unity-settings-daemon

This is a known bug:

https://bugs.launchpad.net/unity/+bug/1226962

I recommend you subscribing to it to receive updates and marking it as affecting you to increase the bug "heat" score.

Workaround for some system hotkeys and two layouts (English and non-Latin): rebind all hotkeys in your local layout. For example instead of Ctrl+Alt+T use Ctrl+Alt+τ (Greek tau). That hotkey still works with the English layout. If you use English and two different non-Latin layouts this workaround helps only with one of them.