The only strings in the Wizard widget that are localizable are handled using the backBtnText and nextBtnText options. The default values are "Back" and "Next," respectively. You can localize or customize these strings using code like the following.

<script type="text/javascript">
  $(document).ready(function () {
      $("#selector").wijwizard({
          backBtnText: "Arrière",
          nextBtnText: "Suivant"
      });
  });
</script>