StringFormat Localization issues in wpf

// Ensure the current culture passed into bindings is the OS culture.
// By default, WPF uses en-US as the culture, regardless of the system settings.
FrameworkElement.LanguageProperty.OverrideMetadata(
      typeof(FrameworkElement),
      new FrameworkPropertyMetadata(
          XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag)));

From Creating an Internationalized Wizard in WPF

Define the following xml namespace:

xmlns:gl="clr-namespace:System.Globalization;assembly=mscorlib"

Now behold this fantastic fix:

<TextBlock Text="{Binding Path=Model.SelectedNoteBook.OriginalDate, StringFormat='f', ConverterCulture={x:Static gl:CultureInfo.CurrentCulture}" FontSize="20"TextTrimming="CharacterEllipsis" />

I'm well aware this isn't a global fix and you will require it on each of your Bindings but surely that is just good XAML? As far as I'm aware, the next time the binding updates it will use the correct CultureInfo.CurrentCulture or whatever you have supplied.

This solution will immediately update your Bindings with the correct values but it seems like a lot of code for something so rare and innocuous.

I just wanted to add that loraderon's answer works great in most cases. When I put the following line of code in my App.xaml.cs, the dates in my TextBlocks are formatted in the correct culture.

FrameworkElement.LanguageProperty.OverrideMetadata(typeof(FrameworkElement), new FrameworkPropertyMetadata(System.Windows.Markup.XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag)));

I say 'most cases'.For example, this will work out of the box:

<TextBlock Text="{Binding Path=Date, StringFormat={}{0:d MMMM yyyy}}" />
--> "16 mei 2013" (this is in Dutch)

...but when using Run's in a TextBlock, the DateTime is formatted in the default culture.

<TextBlock>
  <Run Text="Datum: " />
  <Run Text="{Binding Path=Date, StringFormat={}{0:d MMMM yyyy}, Mode=OneWay}" />
</TextBlock>
--> "Datum: 16 may 2013" (this is in English, notice the
    name of the month "may" vs. "mei")

For this to work, I needed Gusdor's answer, namely adding ConverterCulture={x:Static gl:CultureInfo.CurrentCulture} to the Binding.

<TextBlock>
  <Run Text="Datum: " />
  <Run Text="{Binding Path=Date, StringFormat={}{0:d MMMM yyyy}, ConverterCulture={x:Static gl:CultureInfo.CurrentCulture}, Mode=OneWay}" />
</TextBlock>
--> "Datum: 16 mei 2013" (=Dutch)

I hope this additional answer will be of use to someone.