Based on the original code in Add a << first < previous next > last >> Pager to Image Nodes Within a Gallery amended about localization.

1. To file template.php add function:

   /* Image Gallery Pager */
   function custom_pager($current_nid, $class = NULL) {
     $tid = reset(array_keys(taxonomy_node_get_terms($current_nid)));
     $result = db_query(db_rewrite_sql('SELECT n.nid, n.title FROM {node} n INNER JOIN {term_node} tn ON n.nid = tn.nid WHERE tn.tid = %s AND n.status = 1 ORDER BY n.sticky DESC, n.created DESC, n.nid DESC'), $tid);
     while ($node = db_fetch_object($result)) {
       $nodes[++$i] = $node;
       if ($node->nid == $current_nid) $x = $i;
     }
     if($x > 1) {
       $output .= l(t('« first'), 'node/'. $nodes[1]->nid, array('title' => check_plain($nodes[1]->title), 'class' => $class), NULL, NULL, FALSE, TRUE);
       $output .= l(t('‹ previous'), 'node/'. $nodes[$x-1]->nid, array('title' => check_plain($nodes[$x-1]->title), 'class' => $class), NULL, NULL, FALSE, TRUE);
     }
     else {
       // not required
       // $output .= '<span class="">' . t(t('« first')) . ' </span>' . '<span class="">' . t('‹ previous') . ' </span>';
     }
     $output .= $x .' ('. $i .')';
     if($x < $i) {
       $output .= l(t('next ›'), 'node/'. $nodes[$x+1]->nid, array('title' => check_plain($nodes[$x+1]->title), 'class' => $class), NULL, NULL, FALSE, TRUE);
       $output .= l(t('last »'), 'node/'. $nodes[$i]->nid, array('title' => check_plain($nodes[$i]->title), 'class' => $class), NULL, NULL, FALSE, TRUE);
     }
     else {
       // not required
       // $output .= '<span class="">' . t(t('next ›')) . ' </span>' . '<span class="">' . t(t('last »')) . ' </span>';
     }
     return $output; 
   }

2. Add the following to node-image.tpl.php (a copy of node.tpl.php in your theme folder):

   <!-- Image Gallery Pager -->
   <div class="pager">
     <?php if ($page != 0 && $terms) { print custom_pager($node->nid); } ?>
   </div>