routes.php

<?php

Router::addUrlFilter(function ($params, $request) {
    if (empty($params['controller'])) {
        return $params;
    }

    if ($params['controller'] === 'Languages' && $params['action'] === 'view') {
        $params['controller'] = 'Locations';
        $params['action'] = 'index';
        $params['language'] = $params[0];
        unset($params[0]);
    }

    return $params;
});