Managing a bilingual store with custom fields and upsells within the single market

[Stem_Flowers]

Hey, everybody!

I am trying to make a store within one market with 2 language versions, as I am also targeting national minorities. The problem is that I really need custom forms, as we are talking about a flower store that requires references, the ability to order at certain times and so on.

I have used "Magical Form Fields", "Buunto - Date Picker" and "Releasit COD Form", however none of the above applications have the required functionality. The only solution I found was the Easify options App, as it allows custom fields. However, it cannot fully satisfy my needs, as I also need the ability to create bandles, upsells and downsells.

Solutions like Transcy are not really suitable, because first of all they are expensive, secondly I need language-dependent redirects and very neat scrollers. Shopify lang & translate is still the best solution (also from SEO point of view). 

Do you have any working cases how to organize this as natively as possible?

P.S. my store: https://sbs.flowers/
Theme: Cascade