I guess localization support is in the todo list.

My default culture language is "es". To make it work with the current database records I had to change these bits in the HomeController.cs:

        public ActionResult Index(string slug) {

            slug = slug ?? "/";
            //this.CurrentPage = _cmsRepository.GetPage(slug, System.Globalization.CultureInfo.CurrentCulture.TwoLetterISOLanguageName);
            this.CurrentPage = _cmsRepository.GetPage(slug, "en");

            return View();
        }

Not sure if there are some other places in the application where the default culture info matters...

HTH,

Eduard