Localization using WPF and resx
http://toadcode.blogspot.com/2008/04/wpf-localization-resx-option.html
[Remember to make your .resx file type public, not internal]
Also – popup dialogs have must be changed back to original or the get file not found errors

Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo("en-US");

Might be good too…
http://jeremybytes.blogspot.com/2013/07/changing-culture-in-wpf.html

Window – Page