Laravel htmlspecialchars() expects parameter 1 to be string, array given

I try to get list of language which provided by languages.php in my config folder and I get this error

htmlspecialchars() expects parameter 1 to be string, array given (View: C:\laragon\www\newproject\resources\views\layouts\panel.blade.php) (View: C:\laragon\www\newproject\resources\views\layouts\panel.blade.php)

Here is my languages.php

<?php

return [
  'en' => [
      'name' => 'English',
      'flag' => 'images/flags/en.png'
  ],
  'fa' => [
      'name' => 'پارسی',
      'flag' => 'images/flags/iran.png'
  ],

];

My middleware Language.php

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Foundation\Application;
use Illuminate\Http\Request;
use Illuminate\Routing\Redirector;
use Illuminate\Support\Facades\App;
use Illuminate\Support\Facades\Config;
use Illuminate\Support\Facades\Session;


class Language
{
    public function handle($request, Closure $next)
    {
      if (Session::has('applocale') AND array_key_exists(Session::get('applocale'), Config::get('languages'))) {
          App::setLocale(Session::get('applocale'));
      }
      else { // This is optional as Laravel will automatically set the fallback language if there is none specified
          App::setLocale(Config::get('app.fallback_locale'));
      }
      return $next($request);
    }
}

LanguageController

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Config;
use Illuminate\Support\Facades\Redirect;
use Illuminate\Support\Facades\Session;

class LanguageController extends Controller
{
    public function index($lang)
    {
      if (array_key_exists($lang, Config::get('languages'))) {
            Session::put('applocale', $lang);
        }
        return Redirect::back();
    }
}

Route

Route::get('lang/{lang}', ['as'=>'lang.switch', 'uses'=>'LanguageController@index']);

and finally my view

<li class="dropdown langs">
  <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false">
   <span class="caret"></span>
</a>

 <ul class="dropdown-menu" role="menu">
   @foreach (Config::get('languages') as $lang => $language)
   @if ($lang != App::getLocale())
   <li>
     <a href=""></a>
   </li>
   @endif
   @endforeach
 </ul>
</li>

via Chebli Mohamed