Add all files

app/Http/Middleware/SetLocale.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\App;
+
+class SetLocale
+{
+    public function handle(Request $request, Closure $next)
+    {
+        if (session()->has('locale')) {
+            $locale = session()->get('locale');
+            App::setLocale($locale);
+        }
+
+        return $next($request);
+    }
+}