How to use Spatie Translatable in filament custom page?

class PrivacyPolicy extends Page implements HasForms, HasActions
{
    use InteractsWithForms;
    use InteractsWithActions;

    protected static ?string $navigationIcon = 'heroicon-o-document-text';

    protected static string $view = 'filament.pages.privacy-policy';

    public ?array $data = [];

    public ?PrivacyPolicyModel $record = null;

    public function mount(): void
    {
        //...
    }

    protected function getHeaderActions(): array
    {
        return [
            LocaleSwitcher::make(),
        ];
    }

    public static function getTranslatableLocales(): array
    {
        return getSupportedLanguagesKeys();
    }

    public function form(Form $form): Form
    {
        return $form->schema([
            //...
        ]);
    }
}

class PrivacyPolicy extends Page implements HasForms, HasActions
{
    use InteractsWithForms;
    use InteractsWithActions;

    protected static ?string $navigationIcon = 'heroicon-o-document-text';

    protected static string $view = 'filament.pages.privacy-policy';

    public ?array $data = [];

    public ?PrivacyPolicyModel $record = null;

    public function mount(): void
    {
        //...
    }

    protected function getHeaderActions(): array
    {
        return [
            LocaleSwitcher::make(),
        ];
    }

    public static function getTranslatableLocales(): array
    {
        return getSupportedLanguagesKeys();
    }

    public function form(Form $form): Form
    {
        return $form->schema([
            //...
        ]);
    }
}