Right-to-left Support
The RadCaptcha fully supports right-to-left (RTL) language locales. In order to turn on the RTL support you should set dir=rtl to the html or body element or at least to its parent element. You can also use the direction:rtl CSS property.
<div dir="rtl">
<telerik:RadCaptcha ID="RadCaptcha1" runat="server" ErrorMessage="Page not valid. The code you entered is not valid"
ValidationGroup="Group">
</telerik:RadCaptcha>
<asp:Button ID="btnVerify" runat="server" Text="Submit Page" Width="150px" ValidationGroup="Group" />
</div>
