Can’t translate strings even with .pot file

Hi, I’ve noticed that I can’t translate label strings because of lack of a default fallback string for labels.

Inside public/class-fsl-public.php I see this:

$title = isset($bar_options['title']) ? $bar_options['title'] : '';
$description = isset($bar_options['description']) ? $bar_options['description'] : '';

But with these, if I delete strings in the plugin admin page (title, description), I can’t translate the default string. Could you replace the 2 lines above with these:

$title = (isset($bar_options['title']) && trim($bar_options['title']) !== '') ? $bar_options['title'] : __('Free delivery on orders over {free_shipping_amount}', 'free-shipping-label-pro');
$description = (isset($bar_options['description']) && trim($bar_options['description']) !== '') ? $bar_options['description'] : __('Add at least {remaining} more to get free shipping!', 'free-shipping-label-pro');

Or something like that?
Thank you.