routes.php

<?php
use Cake\Core\Plugin;
use Cake\Routing\Router;


Router::defaultRouteClass('Route');

$languageCodes = array('fr_FR', 'pt_BR');
$builder = function ($routes) {
    $routes->connect('/', ['controller' => 'Pages', 'action' => 'display', 'home']);
    $routes->connect('/pages/*', ['controller' => 'Pages', 'action' => 'display']);
    $routes->fallbacks('InflectedRoute');
};

foreach  ($languageCodes as $code) {
    Router::scope("/$code", ['lang' => $code], $builder);
}

Plugin::routes();