I am adding localization in my Laravel app.
Let’s say I have the routes slots and slots/{id}. My problem is, when I try to go to slots/{id} page, the controller that handles this route expects $locale as the first variable of the function.

This is my function:

public function show($locale, Slot $slot)
{
    dump($locale);
    return view('slots.show', [
        'slot' => $slot,
    ]);
}

What I’d like is avoid having to pass the $locale variable to every functions of my controllers. Is there a way to do that? Like this:

public function show(Slot $slot)
{
    return view('slots.show', [
        'slot' => $slot,
    ]);
}

I am trying to achieve this without having to add any package like laravel-localization.

This is my middleware:

<?php

namespace AppHttpMiddleware;

use Closure;
use IlluminateHttpRequest;
use IlluminateSupportFacadesURL;
use SymfonyComponentHttpFoundationResponse;

class SetLocale
{
    /**
     * Handle an incoming request.
     *
     * @param  Closure(IlluminateHttpRequest): (SymfonyComponentHttpFoundationResponse)  $next
     */
    public function handle(Request $request, Closure $next): Response
    {
        app()->setLocale($request->segment(1));

        URL::defaults(['locale' => $request->segment(1)]);

        return $next($request);
    }
}

This is what my web.php looks like:

Route::prefix('{locale}')
    ->where(['locale' => '[a-zA-Z]{2}'])
    ->middleware('setlocale')
    ->group(function () {
        Route::domain('{portal:slug}.' . env('APP_DOMAIN'))->name('portal.')->group(function () {    
        Route::get('/', function () {
            return redirect()->route('dashboard');
        });

        Route::middleware(['auth', 'verified', 'institution', 'goodDb'])->group(function () {
                    Route::resource('slots', SlotController::class);

    });

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

Any help would be greatly appreciated! Thanks!