Yeah I would think so but I would assume if one blows up and people understand that they can look at communities outside local then we can all figure it out and make it work

That happened on Reddit, too.

For example, one of my favorite bands is called Elbow. There was a sub called Elbow and a sub called ElbowBand. Both about the band. One was more popular and people were able to find both and decide which they wanted to join.

In your case, instead it is sweden@lemmy.world vs sweden@feddit.de, people will see this and will decide which they will join. One will probably become more popular, but it will sort out.

Even on Reddit you had exactly the same issue for the same reason really.

Reddit had the same issue. Often there were multiple subreddits created for the same topic. Usually, eventually, one would win out. I expect the same thing will happen here.

Another solution on Reddit, of course, was to create a multireddit that included all of these subreddits. I'm not sure if that's possible on Lemmy at this point, but if not I hope it's something that gets implemented. It immediately solves that issue.

In the meantime, just subscribe to all of the similar communities.

Why not subscribe to both? This isn't a novel problem, why come up with a novel solution?