How to properly configure mcamara/laravel-localization (Laravel5.1)?

Question

Laravel

added to app.php :

'locale' => array('ru', 'en'),
в Application Service Providers:
        Mcamara\LaravelLocalization\LaravelLocalizationServiceProvider::class,
в самый конец в  aliases:
'LaravelLocalization' => Mcamara\LaravelLocalization\Facades\LaravelLocalization::class,

in routes.php :

Route::group(
    [
        'prefix' => LaravelLocalization::setLocale(),
    ],
    function () {
        Route::get('/', '[email protected]');
    }
);

I go to the site and an error pops up:
ErrorException in LaravelLocalization.php line 117:
Illegal offset type in isset or empty
What did I do wrong?

Answer 1

Where in the manual does it say what needs to be done 'locale' => array('ru', 'en')?