zentao/extension/ipd/execution/ext/lang/en/effort.php

<?php
$lang->execution->effort            = 'Effort';
$lang->execution->effortAction      = "{$lang->execution->common} Effort";
$lang->execution->taskEffort        = 'Task Effort Table';
$lang->execution->noStart           = "{$lang->executionCommon} is started yet!";
$lang->execution->computeTaskEffort = 'Update Task Effort';

$lang->execution->featureBar['effortcalendar']['calendar']  = 'Calendar';
$lang->execution->featureBar['effortcalendar']['all']       = 'All';
$lang->execution->featureBar['effortcalendar']['today']     = 'Today';
$lang->execution->featureBar['effortcalendar']['yesterday'] = 'Yesterday';
$lang->execution->featureBar['effortcalendar']['thisweek']  = 'This Week';
$lang->execution->featureBar['effortcalendar']['lastweek']  = 'Last Week';
$lang->execution->featureBar['effortcalendar']['thismonth'] = 'This Month';
$lang->execution->featureBar['effortcalendar']['lastmonth'] = 'Last Month';

$lang->execution->beginAndEnd      = 'Begin and End';
$lang->execution->endMoreThanToday = 'End date cannot be greater than today';
$lang->execution->beginMoreThanEnd = 'Begin date cannot be greater than end date';