zentao/extension/lite/my/ext/lang/en/lite.php

<?php
$lang->my->featureBar['contribute']['task'] = array();
$lang->my->featureBar['contribute']['task']['assignedTo'] = 'AssignedToMe';
$lang->my->featureBar['contribute']['task']['openedBy']   = 'CreatedByMe';
$lang->my->featureBar['contribute']['task']['finishedBy'] = 'FinishedByMe';
$lang->my->featureBar['contribute']['task']['closedBy']   = 'ClosedByMe';
$lang->my->featureBar['contribute']['task']['canceledBy'] = 'CancelledByMe';