People capitalize when they shouldn't
This also does my head in for some reason (also, people not using the superior British way of spelling words!), haha. Mostly it's Germans who do that though, since they are used to capitalising all nouns - I don't know if any other languages do this, but that could explain it. Can also always recognise French people by if they put a space before a question or exclamation mark.
I'm Canadian so I find myself doing the worst thing ever, mixing British and American spellings.
As an Aussie I go through the exact same dramas. It's tough trying to be an organized but colourful writer.
Was recently contributing to a project where one of the variables was
colorand the urge to change it tocolourwas huge.In code I try to stick with american spelling just to be consistent with libraries.
Some Italians do it to. Especially with phrases like Open Source. :P