I am assuming other countries have their own clients. Don't quote me on it but I use Rabbit on desktop, and I think that is a Japanese client. They have relays we aren't even allowed to be on unless we live in Japan or are Japanese. So I am guessing, now that Nostr is forking all over the world, we don't see all the options. Especially in places that speak other languages. Again, don't quote me, I am assuming and that is why I said the USA (or maybe I should say English dominated Clients and Apps....I don't know I had seen Rabble say something about how people from other countries need to find people who speak their own language, he has been talking about it for a couple of weeks, so I don't know....i am going to exit this conversation lol)