zentao/extension/xuan/common/ext/lang/en/xuanxuan.php

<?php
$lang->xuanxuan = new stdclass();

$lang->navGroup->im         = 'admin';
$lang->navGroup->setting    = 'admin';
$lang->navGroup->client     = 'admin';
$lang->navGroup->conference = 'admin';
$lang->navGroup->watermark  = 'admin';

$lang->confirmDelete = 'Do you want to delete it?';