Considering the large spanish speaking part of the world, I'd imagine (without knowing) that there's at least SOME international interest in Leonor and Sofia outside of Spain. IMO, there's only a real interest in the BRF in the countries that speak English as their official language/mother tongue. To the rest of us, they're irrelevant and not interesting.
In my country we get more info on the BRF. F course we get info on the SRF and they are the ones invited to official events, presidential inaugurations and the like.
Since Max married into the DRF we also get news on them (it didnt exist as a country with a monarchy before that to us) and of course the Monegasque one (Grace magic still goes strong).
On Sweden I only remember seeing about CP and Sofia's wedding (and the snake pics, of course
Unless you are a royal watcher there is nothing on the news about the Yorks, but plenty on W,K&H and G&C of Cambridge. Nobody will care about Harry's kids if he has them (or maybe they will, because Diana, like Grace in Monaco)