Multi language web

Hi, I'm using localization to make my website  Multi-language website so what I did is in the Language folder I added the following, en folder, and ar folder. So the structure is 

Language
  ar
     home_view.php
   en
     home_view.php
and in the routes.php I added the {locale} like below

PHP Code:

$routes->get('{locale}/', 'Home::index');
$routes->get('changelang/(:any)', 'Home::changelang/$1');
$routes->get('f', 'Home::f');


// Post routes

$routes->group('post' , function($routes){
    $routes->add('{locale}/','post\Post::index');
});

// User
$routes->group('user' , function($routes){
    $routes->add('{locale}/register','User\Users::register');
    $routes->get('login' , 'User\Users::login');
    $routes->add('{locale}/logout' , 'User\Users::logout');
});
// Admin
$routes->group('admin' ,['filter' => 'AdminFliter'], function($routes){
    $routes->add('{locale}/dashboard' , 'User\Admin::dashboard');
    $routes->get('{locale}/profile' , 'User\Admin::profile');
    $routes->add('{locale}/edit_profile' , 'User\Admin::edit_profile');
    $routes->add('{locale}/posts' , 'User\Admin::posts');
    $routes->add('{locale}/addPost' , 'User\Admin::addPost');
    $routes->add('{locale}/post_delete/(:any)' , 'User\Admin::post_delete/$1');
    
}); 


it is working only with the home page which is the route and the others it gives me
404 - File Not Found

Controller or its method is not found: {0}::{1}

so what I am missing?