I'm from Sweden and my name is Johan (equivalent to John). I have been rather inactive on Wikipedia the later years, since I got rather involved in the FlightGear flight simulator community.
When I was more actively editing Wikipedia I tended to spend most of my edits on the Swedish Wikipedia, where I wrote about surveying, geodesy, real property law and whatever fell before my eyes, with a preference for technology. I also tried to help newcomers with sectioning, headlines, reference templates and layout.
On Wikimedia Commons, where I didn't spend that much time, I mostly did categorization though I have also uploaded a few files.
