LanguageMenu

Pick the UI locale — when there is more than one to pick from.

mocanvas ships no message catalogues: its own labels are English display text, and overrides.translations is where an app's dictionaries come from. So the list is the host's locales, not the twenty-five entries of LANGUAGES — offering a language for which no strings exist is a promise the library cannot keep, and a user who picks one and sees nothing change learns that the menu lies. With no dictionaries, or only one, this renders nothing at all.