I am new to Linux - and Mint. So this could be pretty trivial.
I am unable to set a different layout from the keyboard preference. E.g if I add an new layout (swiss-french), this layout is not activated in the "type to test settings" or any other window.
Is there something else that needs to be installed to have this work.
Another info: I use a logitech Cordless Desktop EX110. But i can't see how it could be related to the keyboard model. I got the same problem with the default keyboard.