Cambiar texto "Apply" al botón de un filtro expuesto en Drupal 7

Fuente: http://canedux.drupalgardens.com/content/cambiar-texto-apply-al-bot%C3%B3n-de-un-filtro-expuesto-en-drupal-7

function MYTHEME_preprocess_views_exposed_form(&$vars, $hook) {

  // only alter the jobs search exposed filter form
  if ($vars['form']['#id'] == 'views-exposed-form-jobs-search-page-1') {

    // Change the text on the submit button
    $vars['form']['submit']['#value'] = t('Search');

    // Rebuild the rendered version (submit button, rest remains unchanged)
    unset($vars['form']['submit']['#printed']);
    $vars['button'] = drupal_render($vars['form']['submit']);
  }
}