construprogress/app/Livewire/LanguageSwitcher.php

<?php

namespace App\Livewire;

use Livewire\Component;
use Illuminate\Support\Facades\App;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Session;

class LanguageSwitcher extends Component
{
    public string $currentLocale;

    public function mount(): void
    {
        $this->currentLocale = App::getLocale();
    }

    public function switchLanguage(string $locale): void
    {
        if (!in_array($locale, ['en', 'es'])) {
            return;
        }

        Session::put('locale', $locale);

        if (Auth::check()) {
            $user = Auth::user();
            $user->locale = $locale;
            $user->save();
        }

        // Dispatch a browser event — JavaScript reloads the page.
        // PHP-side redirects break because $this->redirect() runs inside
        // /livewire/update (the AJAX endpoint), not on the real page URL.
        $this->dispatch('locale-changed');
    }

    public function render()
    {
        return view('livewire.language-switcher');
    }
}