plugins/calendar/functions.inc
    $eventform->set_var('lang_htmnotallowed', $LANG_CAL_1[44]);

plugins/calendar/templates/editpersonalevent.thtml
                                        <td align="center" colspan="2">{lang_htmlnotallowed}</td>

plugins/calendar/templates/submitevent.thtml
                                <div class="form-field">{lang_htmnotallowed}</div>

plugins/links/functions.inc
    $linkform->set_var('lang_htmlnotallowed', $LANG12[35]);

plugins/links/templates/submitlink.thtml
                                        <td align="center" colspan="2">{lang_htmlnotallowed}</td>

public_html/calendar/event.php
    $cal_templates->set_var('lang_htmlnotallowed', $LANG_CAL_1[44]);