my-projects-website/app/application/bootstrap/app.php

<?php

use Illuminate\Foundation\Application;
use Illuminate\Foundation\Configuration\Exceptions;
use Illuminate\Foundation\Configuration\Middleware;
use Illuminate\Support\Facades\Route;

return Application::configure(basePath: dirname(__DIR__))
    ->withRouting(
        web: __DIR__.'/../routes/web.php',
        commands: __DIR__.'/../routes/console.php',
        health: '/up',
        then: function () {
            Route::middleware(['web', \App\Http\Middleware\ProjectDomainAndLanguage::class])->group(base_path('routes/web-project.php'));
            Route::middleware(['web', \App\Http\Middleware\ProjectAndLanguage::class])
                ->prefix('project/{project}')
                ->as('project.')
                ->group(base_path('routes/web-project.php'));
        },
    )
    ->withMiddleware(function (Middleware $middleware) {
        //
    })
    ->withExceptions(function (Exceptions $exceptions) {
        //
    })->create();