WPF application with different CurrentCulture and CurrentUICulture

Question

Our goal is to offer to user setting up different application language and formatting (e.g. texts in English but Date/Number formats in German). So far I have tried different ways and most promising is this one (of course simplified hardcoded version):

var german = new CultureInfo("de-DE");
var english = new CultureInfo("en-US");

Thread.CurrentThread.CurrentCulture = german;
CultureInfo.DefaultThreadCurrentCulture = german;

Thread.CurrentThread.CurrentUICulture = english;
CultureInfo.DefaultThreadCurrentUICulture = english;
FrameworkElement.LanguageProperty.OverrideMetadata(typeof(FrameworkElement), new FrameworkPropertyMetadata(XmlLanguage.GetLanguage(english.IetfLanguageTag)));

Unfortunately the last line enforce also English formatting for dates and numbers(not just for text). And there is no "CultureProperty" in FrameworkElement to override. So is there a way how to achieve desired behavior without using StringFormat everywhere?

When I try to use german culture for the last line instead of english, then some of the texts are in german instead of english (which is again not correct).

Answer 1

You can use WPF Converter to change culture setting by default.