在Cakephp 3中切换语言

Question

In my bootstrap.php I am using

DispatcherFactory::add('LocaleSelector');
ini_set('intl.default_locale', 'en_US');

Now I want to create a language Switch, I tried this in my routes.php

Router::addUrlFilter(function ($params, $request) {
    if (isset($request->params['lang']) && !isset($params['lang'])) {
        $params['lang'] = $request->params['lang'];
    } elseif (!isset($params['lang'])) {
        $params['lang'] = 'en'; // set your default language here
    }
    return $params;
});

Router::scope('/:lang/*', function ($routes) {
    $routes->connect('/', ['controller' => 'Pages', 'action' => 'display', 'home']);
});

And calling it in the home.ctp

<?= $this->Html->link(__('Englisch'), ['lang' => 'de']);?>

Also I was looking at - http://book.cakephp.org/2.0/en/core-libraries/internationalization-and-localization.html - but I wasnt able to figure out what to do.