Debugging and Preferred Language

Hello,
since I installed Sierra I find that after opening a Xojo project, if in System Preferences I change the preferred language (for instance, from English to Italian), and debug the project, the newly selected preferred language is ignored. That is: everything (labels etc.) is still in English; Italian constants are not fired.
I’m pretty sure in Yosemite everything showed up in Italian.
Is this behavior the expected one? Or is there a trick to make effective a newly selected preferred language?
BTW: exiting the debugger, the myApp.debug file disappears.
Using Xojo 2016v1.1
Thanks.