code: protected String xlate (String bundle, String message)
      {
          if (bundle != null && _ctx.getMessageManager() != null) {
              MessageBundle msgb = _ctx.getMessageManager().getBundle(bundle);
              if (msgb == null) {
                  log.warning("No message bundle available to translate message", "bundle", bundle,
                              "message", message);
              } else {
                  message = msgb.xlate(message);
              }
          }
          return message;
      }
docs: Translates the specified message using the specified bundle.