Add all files

app/Livewire/Components/LanguageSwitch.php

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+<?php
+
+namespace App\Livewire\Components;
+
+use App\Livewire\Component;
+
+class LanguageSwitch extends Component
+{
+    public $currentLocale;
+
+    public function mount()
+    {
+        $this->currentLocale = session('locale', config('app.locale'));
+    }
+
+    public function updatedCurrentLocale($locale)
+    {
+        if (!array_key_exists($locale, config('app.available_locales', []))) {
+            return;
+        }
+
+        session(['locale' => $locale]);
+        app()->setLocale($locale);
+
+        return $this->redirect(request()->header('Referer', '/'), navigate: true);
+    }
+
+    public function render()
+    {
+        $locales = config('app.available_locales');
+
+        return view('components.language-switch', compact('locales'));
+    }
+}