How to change "Save Draft" value on Webform?
Code to change the text for Save Draft button is: 

function customisations_form_alter(&amp;$form, &amp;$form_state, $form_id) {
  if ($form_id == 'webform_client_form_88') {
    $form['actions']['draft']['#value'] = 'Save';
  }
}


This would change only for Save to Draft button. In order to change the submit button text of the webform, we can use the configuration of the Webform to change it. URL for the same is node/88/webform/configure.



Hope that this helps.