[emisand]

It worked!

This is the new code:

PHP Code:

    $name = $_SERVER['SERVER_NAME'];
    $uri = $_SERVER['REQUEST_URI'];

    if( stripos($name, "forum.herogamers") !== false )
    {
        if( stripos($uri, "langid=3") !== false )
        {
            $newurl = "http://foro.herogamers.net" . $uri;

            if( !headers_sent() )
            {
                header("Location: " . $newurl . "");
                die();
            }
        }
        else
        {
            $_REQUEST['langid'] = 1;
        }
    }
    else if( stripos($name, "foro.herogamers") !== false )
    {
        if( stripos($uri, "langid=1") !== false )
        {
            $newurl = "http://forum.herogamers.net" . $uri;

            if( !headers_sent() )
            {
                header("Location: " . $newurl . "");
                die();
            }
        }
        else
        {
            $_REQUEST['langid'] = 3;
        }
    } 


I had to remove the $vbulletin->userinfo['languageid'] thing because in init_startup that information is not initialized yet.