Need help with translating routes

Hello to all,

need help, im beginner in this and i am trying to translate my routes

Web.php,

Route::prefix('{locale}') ->where(['locale' => '[a-zA-Z]{2}']) ->middleware('SetLocale') ->group(function () {

        Route::view('/', 'welcome', ['name' => ("welcome")]);
        Route::view('/sluzby', 'sluzby', ['name' => ('sluzby')]);
        Route::view('/harmonogram', 'harmonogram', ['name' => 'harmonogram']);
        Route::view('/kontakt', 'kontakt', ['name' => 'kontakt']);
        Route::view('/gdpr', 'gdpr', ['name' => 'gdpr']);
        Route::view('/dashboard', 'dashboard', ['name' => 'dashboard']);

});

        Route::get('/', function () {
        return redirect(app()->getLocale());

});

SetLocale middleware:

class SetLocale { public function handle(Request $request, Closure $next) { $locale = $request->segment(1);

    if (empty($locale)) {

        $locale = config('app.locale');
    };
    // dd($locale);

    App::setLocale($locale);

    URL::defaults(['app.locale' => $locale]);

    return $next($request);
}

}

bootstrap/app.php

return Application::configure(basePath: dirname(DIR)) ->withRouting( web: DIR.'/../routes/web.php', commands: DIR.'/../routes/console.php', health: '/up', ) ->withMiddleware(function (Middleware $middleware) {

     $middleware->web(append: [
        SetLocale::class,
    ]);
})

->withExceptions(function (Exceptions $exceptions) {
    //
})->create();

config/app.php:

'locale' => 'cs',

'fallback_locale' => env('APP_FALLBACK_LOCALE', 'en'),

'faker_locale' => env('APP_FAKER_LOCALE', 'en_US'),

'available_locales' => [
    'cs',
    'en',
],

I also published lang folder with cs and en folders that contain paths.php and general.php, where i have the translations.

And it's giving this error setlocale(): Argument #1 ($category) must be of type int, Illuminate\Http\Request given

Many thanks for help.