I am not in the United States

I am in Australia, and once posted from Singapore and Malaysia. My location is written on every post on this site, and every entry in the RSS feed. I use a redundant U in words like colour. I substitute Z with S where I can. I even employ international units of measurement like kilometres, Celsius, and megabytes. How this basic geographic fact continues to elude people who send me comments is fascinating, and admittedly a bit frustrating. For reference, I have highlighted Australia in teal be...