There is a ton of people out there who can write British English & study computer science.
Satoshi flitted between US and UK English. It's easily done, mostly just drop or add a few u's in to a few words.
As for Satoshi's true identity, I really do believe it is one of those things we'll never know.
If you believe it doesn't matters to know who are the great scientists that have shaped this world, this very own opinion is up to you.
Whoever Satoshi is clearly went to a lot of trouble to conceal they're identity, so while it may matter to you, clearly they think it does not matter.