Princess Salvia of what?

I was researching the British Royal Family hence the idea.

So we all know Princess Salvia, right? If she is a princess then she must be a princess of a kingdom. It follows that there must be a kingdom in the Pokémon world. So far, we do not actually know of any kingdoms. Furthermore, she was referred to as an ambassador, indicating that she is a foreigner as far as the then current town is concerned.

One should also notice that each region in the Pokémon Anime functions as a nation, considering that the governmental system and cultural features remains the same as our characters travel. I would then wager that if a kingdom was to exist, then it should consist of an entire region.

Now I am not too familiar with the new leak of the Galar region, but according to what I have seen, it seems like it is supposed to be England.

And guess what, England still has royalty. Could it be that Salvia is actually princess of the Galar region?

I know that the first few regions (Kanto, Johto, Hoenn?) were Japan and Japan still has royalty, but a Japanese princess would not be named Salvia and dressed like Western Royalty, would her?