@nt
been thinking about the Interslavic synthesised language
The slavic language family actually had 3 distinct sub-groups: eastern, western and southern.
Within the groups, speakers can mostly understand each other (70-90%) but outside the groups it’s impossible.
For example: I speak Russian and get the gist of Ukranian and Belarussian, but I only understand a few words of Polish (western) and Serbo-Croat (southern)
Interslavic was manually designed and developed to combine the common denominator of every slavic language, such that anyone can comprehend it with 70-90% overlap.
Even though I have no chance of understanding Polish, for example, both me and any Polish person will be able to understand most of a text written in Interslavic. And so can any Ukranian, Serbian, Bulgarian, Czech, Slovakian person, etc, etc
There are only 20k speakers (it’s not part of any physical culture, only Discord and Reddit - it’s synthesised after all), and theoretically any of those speakers can communicate with the ~350m people speaking slavic languages. But they probably won’t be able to understand most of what they hear back.