Localizing GridFilterMenu to Arabic

protected void Page_Load(object sender, EventArgs e)

        {

            if (!Page.IsPostBack)

            {

                Telerik.Web.UI.GridFilterMenu menu = RadGrid1.FilterMenu;

                foreach (Telerik.Web.UI.RadMenuItem item in menu.Items)

                {

                    switch (item.Text)

                    {

                        case "NoFilter":

                            item.Text = "بدون فلترة"; break;

                        case "Contains":

                            item.Text = "يحتوي على"; break;

                        case "DoesNotContain":

                            item.Text = "لا يحتوي على"; break;

                        case "StartsWith":

                            item.Text = "يبدأ بـ"; break;

                        case "EndsWith":

                            item.Text = "ينتهي بـ"; break;

                        case "EqualTo":

                            item.Text = "يساوي"; break;

                        case "NotEqualTo":

                            item.Text = "لا يساوي"; break;

                        case "GreaterThan":

                            item.Text = "أكبر من"; break;

                        case "LessThan":

                            item.Text = "أقل من"; break;

                        case "GreaterThanOrEqualTo":

                            item.Text = "أكبر من أو يساوي"; break;

                        case "LessThanOrEqualTo":

                            item.Text = "أقل من أو يساوي"; break;

                        case "Between":

                            item.Text = "بين"; break;

                        case "NotBetween":

                            item.Text = "ليس من بين"; break;

                        case "IsEmpty":

                            item.Text = "فارغ"; break;

                        case "NotIsEmpty":

                            item.Text = "غير فارغ"; break;

                        case "IsNull":

                            item.Text = "لا شيء"; break;

                        case "NotIsNull":

                            item.Text = "بلا لا شيء"; break;

                        case "Custom":

                            item.Text = "مخصص"; break;

                    }

                }

            }

        }