Localization of WPF application

You can follow these steps

1 Creating the Resource Files

Add this file StringResources.xaml to Ressources directory. Sample is here:

<ResourceDictionary 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     xmlns:system="clr-namespace:System;assembly=mscorlib">

     <system:String x:Key="close">Close</system:String>
</ResourceDictionary>

You can create several files, one for each language.

2 Adding the Resource (Call this when you start your application)

private void SetLanguageDictionary()
{
     ResourceDictionary dict = new ResourceDictionary();
     switch (Thread.CurrentThread.CurrentCulture.ToString())
     { 
       case "en-US":
         dict.Source = new Uri("..\\Resources\\StringResources.xaml", UriKind.Relative);
         break;
       case "fr-CA":
         dict.Source = new Uri("..\\Resources\\StringResources.fr-CA.xaml", UriKind.Relative);
         break;
       default :
         dict.Source = new Uri("..\\Resources\\StringResources.xaml",UriKind.Relative);
         break;
     }
     this.Resources.MergedDictionaries.Add(dict);
}

3 Using the Resource, like this -

<Button      
   x:Name="btnLogin"
   Click="btnLogin_Click"
   Content="{DynamicResource login}"
   Grid.Row="3"
   Grid.Column="0" 
   Padding="10" />