How to change base config dynamic?

You can try like this.
Config('App')->foo = 'bar';

Or a bug, or I do not understand.
Lang added


app/congig/App.php

Code:

public $defaultLocale = 'en';
public $negotiateLocale = false;
public $supportedLocales = ['en', 'ru'];

 
in controller

Code:

public function index()
{
    
   Config('App')->negotiateLocale  = true;
   Config('App')->defaultLocale = 'ru';
       
       $data = array(
           'title' => 'Blog data array',
           'heading' =>  lang('app.secLine'),
       );
       
       echo view('header', $data);
       echo view('welcome', $data);
       echo view('footer', $data);
    
}

in views 

Code:

<?=  lang('app.firstLine');  ?>

With language file takes from the English.