We have no indication of the many, many other copycat apps that were let through may also already support Swedish. So if that low hanging fruit is covered, scratch that as a distinct feature...
1. Apple doesn't actually have a "no copycat apps" policy, instead its an unwritten and inconsistently enforced rule
2. In this case, providing a Swedish version of the game is actually good for users and arguably should be encouraged
I don't think anyone is under the illusion that this isn't a Wordle copycat. Even the author knows it.