crop-monitor/core/components/usersonline/lexicon/en/setting.inc.php

<?php

    $_lang['area_usersonline_main'] = 'Main';

    $_lang['setting_usersonline_mgr_check'] = 'Enable in Manager?';
    $_lang['setting_usersonline_mgr_check_desc'] = 'Turning on tracking in mgr context.';

    $_lang['setting_usersonline_time_span'] = 'Time span';
    $_lang['setting_usersonline_time_span'] = 'Unit seconds, 20 minutes = 1200, 15 minutes = 900, 10 minutes = 600, 5 minutes = 300';