add ger language

Theme/Backend/Lang/Navigation.de.lang.php

@@ -0,0 +1,17 @@
+<?php
+/**
+ * Orange Management
+ *
+ * PHP Version 7.4
+ *
+ * @package   Modules\MyPrivate
+ * @copyright Dennis Eichhorn
+ * @license   OMS License 1.0
+ * @version   1.0.0
+ * @link      https://orange-management.org
+ */
+declare(strict_types=1);
+
+return ['Navigation' => [
+    'Private' => 'Privat',
+]];