Overarching changes to language changing, not definitive since I'm pondering other alternatives (separate files vs translation files, variables vs functions)

includes/config_session.inc.php

@@ -2,12 +2,14 @@
 
 declare(strict_types=1);
 
+require_once "var_loading.inc.php";
+
 ini_set('session.use_only_cookies' , 1);
 ini_set('session.use_strict_mode' , 1);
 
 session_set_cookie_params([
     'lifetime' => 1800,
-    'domain' => 'ethernal.win',
+    'domain' => $_ENV["COOKIES_SITE"],
     'path' => '/',
     'secure' => true,
     'httponly' => true
@@ -28,4 +30,11 @@ if ( !isset($_SESSION["last_regen"]) ){
 function session_regen() {
     session_regenerate_id();
     $_SESSION["last_regen"] = time();
-}
+}
+
+# Default language
+if (!isset($_SESSION["lang"])) {
+    $_SESSION["lang"] = "es";
+}
+
+$lang = $_SESSION["lang"];