How to get language switching back in Laravel 4

In Laravel 3, we could easily change from a language to another by prefixing the route URL with the language code (for example http://mysite.com/account/info becoming http://mysite.com/fr/account/info).

With Laravel 4, this feature is not available anymore. With that in mind, @jacekd on Github had the idea of adding a code to handle this feature in the App::before filter. I optimized it using Laravel's core methods.

Here are the steps needed to get language switching back in Laravel 4:

1. add an Array containing the available languages in config/app.php

   'languages' => array('en', 'fr', 'de', 'es'),

2. add this code to filters.php

   App::before(function($request)
   {
       if ( in_array(Request::segment(1), Config::get('app.languages')) ) {
           Session::put('locale', Request::segment(1));
           return Redirect::to(substr(Request::path(), 3));
       }
       if ( Session::has('locale') ) {
           App::setLocale(Session::get('locale'));
       }
   });