class PageController extends NestedModuleController
{
    //...

    protected function form(?int $id, ?TwillModelContract $item = null): array
    {
        $item = $this->repository->getById($id, $this->formWith, $this->formWithCount);

        ///default locale ancestor slug
        $this->permalinkBase = $item->ancestorsSlug;
        ///multiple locale ancestor slugs
        $locales = config('translatable.locales');
        $this->localizedPermalinkBase = [];
        foreach (config('translatable.locales') as $locale) {
            $baseFolder = \Lang::get('routes.articles', [], $locale);///or whatever your translation is called
            $slug = $item->getAncestorsSlug($locale);

            $this->localizedPermalinkBase[$locale] = $baseFolder . ($slug != '' ? '/' : '') . $slug;
        }

        return parent::form($id, $item);
    }

)

class PageController extends NestedModuleController
{
    //...

    protected function form(?int $id, ?TwillModelContract $item = null): array
    {
        $item = $this->repository->getById($id, $this->formWith, $this->formWithCount);

        ///default locale ancestor slug
        $this->permalinkBase = $item->ancestorsSlug;
        ///multiple locale ancestor slugs
        $locales = config('translatable.locales');
        $this->localizedPermalinkBase = [];
        foreach (config('translatable.locales') as $locale) {
            $baseFolder = \Lang::get('routes.articles', [], $locale);///or whatever your translation is called
            $slug = $item->getAncestorsSlug($locale);

            $this->localizedPermalinkBase[$locale] = $baseFolder . ($slug != '' ? '/' : '') . $slug;
        }

        return parent::form($id, $item);
    }

)