setting locale in Laravel to multilingual feature

I'm working on Laravel 5.1.40 LTS, I'm trying to implement the multilingual function in my site. So, in the resources/lang I have a folder for english and another for spanish translations, until here everything is ok. So, in the view I have a combobox to select which language want the user, this is my code:

{!! Form::open(array('url' => 'changelanguage'))  !!}
{!!Form::select('lang',['en'=>'en','es'=>'es'],Session::get('language',Config::get('app.locale')),['onchange'=>'submit()']) !!}
{!! Form::close() !!}

Then, in the controller I have:

public function postChangeLanguage()
    {
        $rules = [
            'language' => 'in:en,es' 
        ];

        $language = Input::get('lang'); //lang is name of form select field.

        $validator = Validator::make(compact($language),$rules);

        if($validator->passes())
        {
            Session::put('language',$language);
            App::setLocale($language);

            return Redirect::back();
        }
        else
        {   return Redirect::back();}
    }

So, I checked and here I have correctly the choosed language, and just after set the locale to check if the variable has change I put:

App::getLocale()

and this print correctly the value. But, in the view nothing changes, I put this in the view:

<h1>the locale</h1>

And always it prints 'en' for english. So it seems like in the controller the value is changed but it the view nothing changes. What should I check? what I'm missing? Thanks

via Chebli Mohamed