Play framework Localization and Internationalization

Here is the good demo for localization.
https://github.com/boldradius/Play_i18n_demo

There is some trick is :

1:  Scala did not support Http Context.
The java extend controller call  ctx().changeLang(language); 
I could not find the similar code.

2:  The template play.i18n  Messages.get is deprecated.  should use play.api.i18n Message

3:  The controller should  must use   implicit request  

          def index() = Action.async { implicit request =>
                Future.successful(Ok(views.html.index()))
         }

4:  For custom http handler there is no implicit request.
    please give :

         val currentLang = request.cookies.get("PLAY_LANG").get.value

         val ipMessages: Messages = new Messages( Lang(currentLang), messagesApi)
    That all message came from ipMessages that should be fine.