Double header (multilingual)

FSE question: I know the topic is still fresh.

I thought it wouldn’t be rocket science to create 2 separate headers with 2 separate navigation menus to handle multilingual.
In fact, I can’t.
I may save and name each item separately, create template parts, reusable blocks, in the end each change in one navigation menu from one header affects the other navigation menu in the other header (and vice versa).

I had the impression you could logically create 2 distinct header templates and assign them to your pages the way you want.
I have been using Polyglot so far, but as they don’t provide a free FSE version, I started to look for other solutions, especially because I have few needs.

If this concept is not mature yet, I mean double headers/double navigation menus, I am thinking about migrating to a multisite (and it might be fun).

Basically if anyone struggle the same way, have information (like it’s not ready yet) and any smart solution to do multilingual, feel free to share.

Thanks a lot,
Renan.

Does it speak to someone or has anyone really put their nose in it yet?
Thanks if you have any ideas. Good weekend