Laravel 10.x Localization not working using session

Question

I have tried several tutorials in the internet but it doesn't work or the language not changing, I already stored the translation into \lang directory, and the session is already set Localization Session

here is my source code:

This is my controller :

class LocalizationController extends Controller
{
    public function setLang($locale)
    {
        App::setLocale($locale);
        Session::put("locale", $locale);

        return redirect()->back();
    }
}

This is my Middleware :

class LocalizationMiddleware
{
    /**
     * Handle an incoming request.
     *
     * @param  \Closure(\Illuminate\Http\Request): (\Symfony\Component\HttpFoundation\Response)  $next
     */
    public function handle(Request $request, Closure $next): Response
    {
        if (Session::get("locale") != null) {
            App::setLocale(Session::get("locale"));
        } else {
            Session::put("locale", "en");
            App::setLocale(Session::get("locale"));
        }

        return $next($request);
    }
}

This is the route :

Route::get("locale/{lang}", [LocalizationController::class, 'setLang']);

Language Switcher :

<a href="{{ url('locale/id') }}"><img class="h-5 mt-4" src="{{ asset('images/flag/id_flag.png') }}"
                alt=""></a>
        <a href="{{ url('locale/en') }}"><img class="h-5 mt-4" src="{{ asset('images/flag/uk_flag.png') }}"
                alt=""></a>

Translated Element :

<h1 class="font-black lg:text-5xl md:text-4xl text-3xl md:w-[500px] mx-auto">{{ __('home.hero.header') }}</h1>

I have tried several tutorials in the internet, please help.

Answer 1

I already solve the problem, I put the middleware classes \App\Http\Middleware\LocalizationMiddleware::class, into the wrong middleware kernel group.

Wrong kernel group :

protected $middleware = [
        // \App\Http\Middleware\TrustHosts::class,
        \App\Http\Middleware\TrustProxies::class,
        \Illuminate\Http\Middleware\HandleCors::class,
        \App\Http\Middleware\PreventRequestsDuringMaintenance::class,
        \Illuminate\Foundation\Http\Middleware\ValidatePostSize::class,
        \App\Http\Middleware\TrimStrings::class,
        \Illuminate\Foundation\Http\Middleware\ConvertEmptyStringsToNull::class,

        // I put the middleware classes here
        // \App\Http\Middleware\LocalizationMiddleware::class,
    ];

Group that i should put the middleware:

protected $middlewareGroups = [
        'web' => [
            \App\Http\Middleware\EncryptCookies::class,
            \Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
            \Illuminate\Session\Middleware\StartSession::class,
            \Illuminate\View\Middleware\ShareErrorsFromSession::class,
            \App\Http\Middleware\VerifyCsrfToken::class,
            \Illuminate\Routing\Middleware\SubstituteBindings::class,

            // I should put it here
            \App\Http\Middleware\LocalizationMiddleware::class,
        ],