Locale + Admin

admin.php

<?php

Route::get('/', 'DashboardController')->name('dashboard');

RouteServiceProvider.php

<?php

namespace App\Providers;

use Illuminate\Foundation\Support\Providers\RouteServiceProvider as ServiceProvider;
use Illuminate\Support\Facades\Route;

class RouteServiceProvider extends ServiceProvider
{
    //
    protected $namespace = 'App\Http\Controllers';

    //
    public const HOME = '/home';

    //
    public function boot()
    {
        parent::boot();
    }

    //
    public function map()
    {
        $this->mapApiRoutes();

        $this->mapWebRoutes();

        $this->mapAdminRoutes();
    }

    //
    protected function mapWebRoutes()
    {
        Route::middleware('web')
            ->namespace($this->namespace)
            ->group(base_path('routes/web.php'));
    }

    //
    protected function mapApiRoutes()
    {
        Route::prefix('api')
            ->middleware('api')
            ->namespace($this->namespace)
            ->group(base_path('routes/api.php'));
    }

    //
    protected function mapAdminRoutes()
    {
        Route::prefix('{locale}')
          ->middleware('locale')
          ->group(function () {
            Route::prefix('admin')
              ->middleware('admin')
              ->namespace($this->namespace . '\\Admin')
              ->group(base_path('routes/admin.php'));
          });
    }
}