I'm not saying anything for sure merely curious why Satoshi would use international English and GB British English.
It can be that Satoshi was/is more than one person.
It can be that he was trying to confuse the followers. (I don't think so).
For a person/s who went to great lengths to maintain its identity unknown, using different types of English grammar as well as posting during different times without a particular pattern for all we know could all be intention.
For sure, Satoshi has planned this very carefully and meticulously so any of this would be irrelevant to work out. Satoshi did come up with a novel idea, so having his/their identity exposed could be a life threatening so absolutely he/they will go to extreme lengths to keep it all under wraps.
Agree on this one which it could really be intentional and as you do mention where he would really be doing all sorts of things that would really be just continuing to hide of himself to the public.
This isnt only talking about on being a popular but also talking about security because as a creator of a decentralized thing then for sure there would be lots of things will really be threatening your life.
Its just normal that he would really be mindful on leaving no trace nor patterns nor hints that would really be revealing himself. This man wont really be that making easy for him to be traced.