How does the copyright system in Luxembourg work?
In Germany for example (this will ignore a lot of nuance!), there is no applying or denying of copyright. If you created something, you own the copyright. It is even in the German name: "Urheberrecht" literally translates to "right of the creator". It can not be sold.
And then there is the second concept of "Verwertungsrecht" or "Nutzungsrecht", which defines who has the right to "utilize" something (often for monetary gain). That fundamentally also starts with the person that created something, but can be sold (either before or after the work is done, for example via a contract).
As far as I know the US copyright system is very different from that, where you have to register or apply, and put (c) on things to show you own the right to moetize (this is even more vague, that is just the impression I got in the last 20 years of being on the internet).
In Germany the big discussion then is around "Schöpfungshöhe" - "threshold of originality" in English maybe - that decides if something is even in this system or not.
Is the discussion in the tweet about that really? If the work deserves to be in the system or not? If so, for "right of creator" or "right to utilize"?