drupal7-breadcrumbs.php

<?php
function HOOK_preprocess_page(&$variables) {
  if (menu_get_object()->type == 'temoignage') {
    drupal_set_breadcrumb([
      l('Home', '<front>'),
      l('Tous les témoignages', 'tous-les-temoignages')
  ]);
  }
}