heya Kestral. Yeah that line is to be added to the bottom of the instant_markup.php in your language directory and should be added to the bottom. It only sets up a language string so that say you were French you could change it to French
tell ya what if ya can Tell me what version of Threads you are adding this to and then upload using a zip your admin/edittheme.php, admin/doedittheme.php, /languages/instant_markup.php, /templates/default/ubbt_instant_ubbcode.tmpl, ubbt.inc.php,/languages/admin/edittheme.php files and I and others will take a look.
