Toolkit JSP tags can identify the client locale so that the
browser renders all the messages in the correct language. This is
possible because of a custom tag (AddBundleTag) that can set the resource
bundle file according to the user locale. This resource bundle contains
the messages in the required language and FieldError and ValidationError
tags can take the error information from the resource bundle using
error codes. See Managing NLS in the HTML Channel documentation for
more information.