Issue with localization and authorization

Hi to everyone. Hi have an issue with localization and authorization. I followed

https://laracasts.com/discuss/channels/tips/example-on-how-to-use-multiple-locales-in-your-laravel-5-website/

but i have some issues when going on auth and password controller becouse the middleware tries to prefix my route to something like domain/locale/login...but i throws a NotFoundHttpException in RouteCollection.php

Any Ideas?

this is my routes.php

/* HOME */
Route::get('/home', ['uses' => 'FrontendHomeController@index', 'as' => 'frontend.home.index']);
Route::get('/chi-siamo', ['uses' => 'FrontendHomeController@chiSiamo', 'as' => 'frontend.home.chi-siamo']);
Route::get('/dove-siamo', ['uses' => 'FrontendHomeController@doveSiamo', 'as' => 'frontend.home.dove-siamo']);
Route::get('/contatti', ['uses' => 'FrontendHomeController@contatti', 'as' => 'frontend.home.contatti']);
Route::get('/campagne', ['uses' => 'FrontendHomeController@campagne', 'as' => 'frontend.home.campagne']);
Route::get('/', ['uses' => 'FrontendHomeController@index', 'as' => 'frontend.home.index']);

/* VALIGIA */
Route::get('/valigia-gluten-free', ['uses' => 'FrontendValigiaController@index', 'as' => 'frontend.valigia.index']);
Route::get('/valigia-gluten-free/acquisto', ['uses' => 'FrontendValigiaController@acquisto', 'as' => 'frontend.valigia.acquisto', 'middleware' => 'auth']);
Route::post('/valigia-gluten-free/pagameto', ['uses' => 'FrontendValigiaController@pagamento', 'as' => 'frontend.valigia.pagamento']);
Route::get('/valigia-gluten-free/successo', ['uses' => 'FrontendValigiaController@successo', 'as' => 'frontend.valigia.successo-pagamento']);
Route::get('/valigia-gluten-free/errore-pagamento', ['uses' => 'FrontendValigiaController@errorePagamento', 'as' => 'frontend.valigia.errore-pagamento']);
Route::get('/valigia-gluten-free/ordini', ['uses' => 'FrontendValigiaController@ordini', 'as' => 'frontend.valigia.ordini', 'middleware' => 'auth']);

/* PRODOTTI */
Route::get('/prodotti', ['uses' => 'FrontendProdottoController@index', 'as' => 'frontend.prodotti.index']);
Route::get('/prodotti/{categoria}', ['uses' => 'FrontendProdottoController@categoria', 'as' => 'frontend.prodotti.categoria']);
Route::get('/prodotti/{categoria}/{prodotto}', ['uses' => 'FrontendProdottoController@prodotto', 'as' => 'frontend.prodotti.dettaglio']);

/* PAGAMENTI */
Route::post('pay_via_paypal', 'PaymentController@postPayment');
Route::get('payment_success', 'PaymentController@getSuccessPayment');

Route::controllers([ 'auth' => 'Auth\AuthController', 'password' => 'Auth\PasswordController' ]);