Made input interface multilingual.

Set proper default for CSS file in password_protect.php.

edit/inc/functions.php

@@ -55,16 +55,18 @@ function loadHttpToGlobals(array $vars) {
 /**
  * Function for loading the language.
  *
+ * @param string $default The default language to use.
+ *
  * @return string[]
  */
-function loadLanguage():array {
+function loadLanguage($default):array {
 
     if (isset($_GET['lan'])) $_SESSION['lan'] = $lan = $_GET['lan'];
     else if (isset($_SESSION['lan'])) $lan = $_SESSION['lan'];
 
     // Default to English
     if (!isset($lan) or !file_exists(__DIR__ . "/translations/$lan.php")) {
-        $lan = "en";
+        $lan = $default;
     }
 
     include __DIR__ . "/../translations/$lan.php";