if ($mode == 'latex') {
            list($state, $match) = $data;
            switch ($state) {
                case DOKU_LEXER_ENTER :
                    $renderer->doc .= '\framebox{';
                    break;
                case DOKU_LEXER_UNMATCHED :
                    foreach ($match as $key) {
                        if (substr($key, 0, 1) == "'" and
                          substr($key, -1, 1) == "'" and
                          strlen($key) > 1) {
                            $out[] = $renderer->_latexSpecialChars(substr($key,1,-1));
                        } else {
                            if (isset($lang[$key])) {
                                $out[] = $lang[$key];
                            } else {
                                $out[] = $renderer->_latexSpecialChars(ucfirst($key));
                            }
                        }
                    }
                    $renderer->doc .= implode('} + \framebox{', $out);
                    break;
                case DOKU_LEXER_EXIT :
                    $renderer->doc .= '}';
                    break;
            }
            return true;
        }