This demo shows how you can use the RadNavigation control for RTL languages.
    
        The control takes into consideration the direction attribute set to the control itself or any parent
        HTML element. If you set the direction of the body tag (or any other parent element
        that contains the control) to rtl, RadNavigation reverses the item order
        and aligns itself to the right side of the container.
    
    
<telerik:RadNavigation ID="RadNavigation1" runat="server" dir="rtl" ... />