I’ve long thought about how wonderful it would be to create a contemporary new hybrid language whose objective was to unify communication along the very common linguistic origins at least some language clusters have. The core challenge of course is that it would be contrived in a time when top down imposition does not work as effectively. It’s a dream I have nonetheless.
It would be a gargantuan effort just alone to devise a language that would unify historic language origins roots in a contemporary time. The objective would be to stop the death and eradication of languages, e.g., Welsh, German, or any of the numerous other smaller languages and dialects that are all under varying states and types of endangerment or extinction risk, but also prevent an ignoble, unstable, and inadequate language like contemporary English from dominating the whole world.
I’m sure you are aware of Esperanto.
https://en.wikipedia.org/wiki/Esperanto
I preferred Interlingua...
But these days, Slovio would help me more.
I've tried Slovio on Slavs of about 10 nationalities. None had ever heard of it. All of then, no exceptions, could just understand it perfectly well, to their great surprise.
https://www.interlingua.com/interlingua-en/
https://www.slovio.com/