zentao/extension/max/custom/ext/lang/en/bizext.php

<?php
$lang->custom->notice->indexPage['product'] = "Product Home is added to ZenTao 5.2+. Do you want to set it as the default page?";
$lang->custom->notice->indexPage['project'] = "Project Home is added to ZenTao 5.2+. Do you want to set it as the default page?";
$lang->custom->notice->indexPage['qa']      = "QA Home is added to ZenTao 5.2+. Do you want to set it as the default page?";

$lang->custom->URStory = "Requirement";
$lang->custom->SRStory = "Story";

$lang->custom->conceptQuestions['URSRName']         = "Define the concept of Requirement and Story.";

$lang->custom->conceptOptions->URAndSR = array();
$lang->custom->conceptOptions->URAndSR['1'] = 'On';
$lang->custom->conceptOptions->URAndSR['0'] = 'Off';