I cannot manage appcompat.
I get some errors so I abandoned that library. I lack of knowhow about the proper version of android support library to use (I have 23.2.1) and the style resources (I don't know if I need some folder named values-v20 or values-v23 or other way).
I get errors launching app, even if I think to have followed what is suggested in the appcompat related post.
I have to find a workAround.
Do you think that it is no possible to switch icons even using reflection or javaobject libs?
Any way, I have the solution, as last chance, to add "settings" icon (a gear) with two submenus, one for each language
thanks
alex