Re: Switching Site Contents and Menus in one click
I agree with you about the necessity of having the same language in content and menus.
My idea is that menus must be subordinated to content. Because the person who is able to read content in one language will also be able to read the menu in the same language, hence you have a sort of guarantee that the reader will not have to see a language that is not understood, in Language Exclusion terms. And the person wants to READ the content in priority, and the menu is just there as a convenient tool.
Maybe it is a good idea to see how the European Union's website deals with this feature.