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> BTW: What is wxWidgets doing with the returned values ?
wxWidgets doesn't call getlocale, it's a C++ library (wrapped by wxPython) that uses C setlocale.
What does use getlocale is time.strptime and datetime.datetime.strptime, so when getlocale fails, strptime fails.
> We could enhance this to return None for the encoding instead
> of raising an exception, but would this really help ?
Very much so.
Frankly, I don't get the impression that the current locale preferred encoding is used for *anything*. Other than possibly having a role in implementing getpreferredencoding.
> Alternatively, we could add "en_DE" to the alias table and set
> a default encoding to use. 
Where would you get a complete list of all the new aliases that would need be to be added?
As the "en_DE" example shows, you'd need all combinations of languages and regions. That's going to be a very long list.