iassign_atto/lang/en/atto_iassign.php

<?php

/**
 * Strings for component 'atto_iassign', language 'en'.
 *
 * @package    atto_iassign
 * @copyright  2014
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
$string['pluginname'] = 'Insert interactive activity (iAssign) by Atto editor';