Update language files, add de_x_sie, and clean up files

language/de_x_sie/portal.php

@@ -0,0 +1,41 @@
+<?php
+/**
+*
+* @package Board3 Portal v2.3
+* @copyright (c) 2023 Board3 Group ( www.board3.de )
+* @license GNU General Public License, version 2 (GPL-2.0-only)
+*
+*/
+
+/**
+* DO NOT CHANGE
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+if (empty($lang) || !is_array($lang))
+{
+	$lang = [];
+}
+
+// DEVELOPERS PLEASE NOTE
+//
+// All language files should use UTF-8 as their encoding and the files must not contain a BOM.
+//
+// Placeholders can now contain order information, e.g. instead of
+// 'Page %s of %s' you can (and should) write 'Page %1$s of %2$s', this allows
+// translators to re-order the output of data while ensuring it remains correct
+//
+// You do not need this where single placeholders are used, e.g. 'Message %d' is fine
+// equally where a string contains only two placeholders which are used to wrap text
+// in a url you again do not need to specify an order e.g., 'Click %sHERE%s' is fine
+
+// Common
+$lang = array_merge($lang, [
+	'PORTAL'					=> 'Portal',
+	'VIEWING_PORTAL'			=> 'Betrachtet das Portal',
+	'BACK'						=> 'Zurück',
+	'B3P_WRONG_METHOD_CALL'		=> 'Falscher Aufruf der Methode %s',
+]);