LocalizationManager.Manager = new CustomLocalizationManager();

LocalizationManager.Manager = New CustomLocalizationManager()

<SupportedCultures>en;nl</SupportedCultures>

private void Application_Startup(object sender, StartupEventArgs e)
        {
            Thread.CurrentThread.CurrentCulture = new CultureInfo("es");
            Thread.CurrentThread.CurrentUICulture = new CultureInfo("es");

            this.RootVisual = new MainPage();
        }

Private Sub Application_Startup(sender As Object, e As StartupEventArgs)
    Thread.CurrentThread.CurrentCulture = New CultureInfo("es")
    Thread.CurrentThread.CurrentUICulture = New CultureInfo("es")

    Me.RootVisual = New MainPage()
End Sub

LocalizationManager.Manager = new LocalizationManager()
{
   ResourceManager = GridViewResources.ResourceManager
};

LocalizationManager.Manager = New LocalizationManager()
LocalizationManager.Manager.ResourceManager = GridViewResources.ResourceManager

public class CustomLocalizationManager : LocalizationManager
{
  public override string GetStringOverride( string key )
  {
      switch( key )
      {
          case "GridViewAlwaysVisibleNewRow":
                    return "点击这里添加新项";
                case "GridViewClearFilter":
                    return "清除筛选";
                case "GridViewFilter":
                    return "筛选";
                case "GridViewFilterAnd":
                    return "并且";
                case "GridViewFilterContains":
                    return "包含";
                case "GridViewFilterDoesNotContain":
                    return "不包含于";
                case "GridViewFilterEndsWith":
                    return "结尾等于";
                case "GridViewFilterIsContainedIn":
                    return "包含在";
                case "GridViewFilterIsEqualTo":
                    return "等于";
                case "GridViewFilterIsGreaterThan":
                    return "大于";
                case "GridViewFilterIsGreaterThanOrEqualTo":
                    return "大于等于";
                case "GridViewFilterIsLessThan":
                    return "小于";
                case "GridViewFilterIsLessThanOrEqualTo":
                    return "小于等于";
                case "GridViewFilterIsNotContainedIn":
                    return "不包含在";
                case "GridViewFilterIsNotEqualTo":
                    return "不等于";
                case "GridViewFilterMatchCase":
                    return "区分大小写";
                case "GridViewFilterOr":
                    return "或";
                case "GridViewFilterSelectAll":
                    return "全选";
                case "GridViewFilterShowRowsWithValueThat":
                    return "显示在行中的值";
                case "GridViewFilterStartsWith":
                    return "开头等于";
                case "GridViewGroupPanelText":
                    return "拖拽一列放在这里进行分组";
                case "GridViewGroupPanelTopText":
                    return "组";
                case "GridViewGroupPanelTopTextGrouped":
                    return "分组于";

      }
      return base.GetStringOverride( key );
  }

Public Class CustomLocalizationManager
 Inherits LocalizationManager
 Public Overrides Function GetStringOverride(key As String) As String
  Select Case key
   Case "GridViewGroupPanelText"
    Return "Zum gruppieren ziehen Sie den Spaltenkopf in diesen Bereich."
   '---------------------- RadGridView Filter Dropdown items texts:
   Case "GridViewClearFilter"
    Return "Filter löschen"
   Case "GridViewFilterShowRowsWithValueThat"
    Return "Anzeigen der Werte mit Bedingung:"
   Case "GridViewFilterSelectAll"
    Return "Alles anzeigen"
   Case "GridViewFilterContains"
    Return "Enthält"
   Case "GridViewFilterEndsWith"
    Return "Endet mit"
   Case "GridViewFilterIsContainedIn"
    Return "Enthalten in"
   Case "GridViewFilterIsEqualTo"
    Return "Gleich"
   Case "GridViewFilterIsGreaterThan"
    Return "Grösser als "
   Case "GridViewFilterIsGreaterThanOrEqualTo"
    Return "Grösser oder gleich"
   Case "GridViewFilterIsLessThan"
    Return "Kleiner als"
   Case "GridViewFilterIsLessThanOrEqualTo"
    Return "Kleiner oder gleich"
   Case "GridViewFilterIsNotEqualTo"
    Return "Ungleich"
   Case "GridViewFilterStartsWith"
    Return "Beginnt mit"
   Case "GridViewFilterAnd"
    Return "Und"
   Case "GridViewFilter"
    Return "Filter"
  End Select
  Return MyBase.GetStringOverride(key)
 End Function
End Class

public override string GetStringOverride( string key )
{
   switch( key )
   {
       //----------------------
       case "GridViewClearFilter":
           return GridViewResources.GridViewClearFilter;
       //----------------------
   }
   return base.GetStringOverride( key );
}

Public Overloads Overrides Function GetStringOverride(ByVal key As String) As String
    Select Case key
        '----------------------
        Case "GridViewClearFilter"
            Return GridViewResources.GridViewClearFilter
        '----------------------
    End Select
    Return MyBase.GetStringOverride(key)
End Function