Why does CurrentUICulture.DisplayName say "English (United States)" and not "English (United Kingdom)"?

I'm in the UK, and I have a UK-bought version of Windows 7, with all settings I can possibly find set to UK (not US). When I run the following code:

Console.WriteLine(Thread.CurrentThread.CurrentUICulture.DisplayName);
Console.WriteLine(Thread.CurrentThread.CurrentCulture.DisplayName);

The output is:

English (United States开发者_运维问答)
English (United Kingdom)

I can't figure out why the first one says United States. I was going to include this in my about window (to help debug multi-lingual issues), but it's gotten me a bit confused!

Anyone know why it doesn't say UK?

By default the CurrentUICulture property is driven by the Windows MUI setting.

MUI is the scheme whereby the language of the OS is displayed in a specific language and is separate from things like number and date formats. Brits don't get our own translation of the Windows UI...

There is no British English translation of Windows (colour vs. color) - we get the US English version.