The Localization property specifies the strings that appear in the runtime user interface of RadUpload. By changing the values of each
named sub-property, you can change the appearance of the string the upload uses.
<telerik:radupload id="RadUpload1"runat="server">
<Localization Select="Browse"/>
</telerik:radupload>
Refer the following link to know more about localization support for RadUpload. Localizing RadUpload