Say I set up an instance focused on discussing parties at home. There are fun in-person games you can play with your friends when many of you are over, so I would create a community c/games for discussing them. Now, what if I want my instance to federate with lemmy.world? They already have a c/games that is dedicated to videogames. Maybe I also would need a community dedicated to videogames, but I'd have to call it c/videogames, because I already have a c/games.

Some human intervention would be required to let the network know that the local c/videogames is the one that has to federate with lemmy.world's c/games, and not the local c/games.

Maybe an automatic suggestion would be fine as a starting point, but it would be more useful that communities themselves could explicitly establish which remote communities they are associated with, without depending on the names.