auto-detect locale based on browser preferences

app/Http/Middleware/SetLocale.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+
+class SetLocale
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @return mixed
+     */
+    public function handle(Request $request, Closure $next)
+    {
+        if (!session()->has('locale')) {
+            session()->put('locale', $request->getPreferredLanguage(
+                config('app.available_locales')
+            ));
+        }
+
+        app()->setLocale(session('locale'));
+
+        return $next($request);
+    }
+}