

To make it easy, the new language would probably be based on a language with most speakers, be it native or learned, and it would further push smaller languages aside. Say, it’s based off a germanic language. Germans or Dutch would learn it in a bit, but Slavic people might struggle.
Languages are tied to people and is a very important part of culture which is why fabricated languages would never even make it, but even if one made it, someone would have advantage in learning it and it’s a powerful tool.
Hannah the Horrible, The Internet Investigator