some code improvemetns

app/Http/Controllers/LocaleController.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+
+class LocaleController extends Controller
+{
+    /**
+     * @return RedirectResponse
+     */
+    public function __invoke($locale)
+    {
+        if (array_key_exists($locale, config('app.locales'))) {
+            session()->put('locale', $locale);
+        }
+
+        return request()->json() ? response()->noContent() : back();
+    }
+}