I don't know who and where Satoshi Nakamoto is, but I know one thing, there is absolutely zero proof he/she/it/they are British and/or NOT American.
For years, people have speculated that Satoshi Nakamoto may be British, or at least not American, because he/she/it/they used to use British spelling when he wrote.
I'm staggered that people think that means anything at all.
I write for a living. I've been doing this for over 10 years. I'm not British, and I'm not American. You can find articles I've written with American spelling, and articles I've written with British spelling. And articles where I've mixed both. And I haven't done it by accident. It was always deliberate.
But some people do it by accident. This is to say, it can happen very frequently.
At my company, our editorial policy dictates we use American spelling even though none of the writers is actually from the United States. Not even one. And there's like 15 of us.
This, by the way, is not *our* policy. It's common policy. Most international media outlets, especially modern ones, favour/favor US spelling and vocabulary.
It goes on. Depending on how you set it, your laptop may automatically correct British or American.
And there's more. English is the most widely spoken second language in the world.
It has learners, as a second language, in over 120 countries. They use both British and American spelling.
Translated. Satoshi Nakamoto could be British in the same way I could be. Or you could be.
He could be from literally anywhere else and just favour British spelling.
Or he could be American and use British spelling for the kicks.
The point is, we don't know. But the fact he used British spelling doesn't mean anything.