Xamarin Forms Localization

Localize.cs

// iOS

public class Localize : ILocalize
{
    private static CultureInfo _currentCulture;

    public CultureInfo GetCurrentCultureInfo()
    {
        if (_currentCulture != null)
        {
            return _currentCulture;
        }
        var netLanguage = "en";
        if (NSLocale.PreferredLanguages.Length > 0)
        {
            var pref = NSLocale.PreferredLanguages[0];

            if (pref == "pt")
                pref = "pt-BR"; // get the correct Brazilian language strings from the PCL RESX
            //(note the local iOS folder is still "pt")

            netLanguage = pref.Replace("_", "-"); // turns es_ES into es-ES
        }

        if (CultureInfo.GetCultures(CultureTypes.AllCultures).Any(x => x.Name == netLanguage))
        {
            return _currentCulture = new CultureInfo(netLanguage);
        }
        return _currentCulture = new CultureInfo("en-US");
    }
}