"Furthermore, observers have concluded that Satoshi was of Commonwealth descent, and this was attributed to the frequent use of British English terminology and spelling in forum postings and comments on the source code, again it was observed that according to the time stamps of Satoshi’s posts on the Bitcoin forum, the posting times were not possible for someone living in Japan, but rather it suited someone resident in Britain."
Unless Satoshi was smart enough to purposefully alter his writing style to throw off any investigators in the future. I'm sure he knew that his life might be in jeopardy if his invention was to threaten the global monetary order.