private function loadDirectories($dirPath)
    {
        $locales = new LocaleCollection;

        foreach ($this->filesystem->directories($dirPath) as $path) {
            $excluded = in_array($key = basename($path), $this->excludedFolders);

            if ( ! $excluded) {
                $locales->addOne(
                    new Locale($key, $path, $this->loadLocaleFiles($path))
                );
            }
        }

        return $locales;
    }