• How to change Input Language programmatically?

/// <summary>
/// Changing Current Input Language to a next installed language
/// </summary>
public void ChangeInputLanguage()
{
   // Nothing to do if there is only one Input Language supported:
    if (InputLanguage.InstalledInputLanguages.Count == 1)
       return;
   // Get index of current Input Language
    int currentLang = InputLanguage.InstalledInputLanguages.IndexOf(InputLanguage.CurrentInputLanguage);
   // Calculate next Input Language
    InputLanguage nextLang = ++currentLang == InputLanguage.InstalledInputLanguages.Count ? 
       InputLanguage.InstalledInputLanguages[0] : InputLanguage.InstalledInputLanguages[currentLang];
   // Change current Language to the calculated:
    ChangeInputLanguage(nextLang);
}

/// <summary>
/// Changing current Input Language to a new one passed in the param
/// </summary>
/// <param name="ISOLang">ISO Culture name string code e.g. "en" for English</param>
public void ChangeInputLanguage(string ISOLang)
{
   // Convert ISO Culture name to InputLanguage object. Be aware: if ISO is not supported
    // ArgumentException will be invoked here
    InputLanguage nextLang = InputLanguage.FromCulture(new System.Globalization.CultureInfo(ISOLang));
   ChangeInputLanguage(nextLang);
}

/// <summary>
/// Changing current Input Language to a new one passed in the param
/// </summary>
/// <param name="LangID">Integer Culture code e.g. 1033 for English</param>
public void ChangeInputLanguage(int LangID)
{
   // Convert Integer Culture code to InputLanguage object. Be aware: if Culture code is not supported
    // ArgumentException will be invoked here
    InputLanguage nextLang = InputLanguage.FromCulture(new System.Globalization.CultureInfo(LangID));
   ChangeInputLanguage(nextLang);
}

/// <summary>
/// Changing current Input Language to a new one passed in the param
/// </summary>
/// <param name="InputLang">New Input Language as InputLanguage object</param>
public void ChangeInputLanguage(InputLanguage InputLang)
{
   // Check is this Language really installed. Raise exception to warn if it is not:
    if (InputLanguage.InstalledInputLanguages.IndexOf(InputLang) == -1)
       throw new ArgumentOutOfRangeException();
   // InputLAnguage changes here:
    InputLanguage.CurrentInputLanguage = InputLang;
}