New Chrome, same old problems
You know, even after selecting the English UK dictionary in Chrome (and being unable to get rid of the extra "English" entry) - and also doing the same in Docs... I still can't get either Chrome or Docs to flag up American spellings. Seriously, try typing color or colour, aluminum or aluminium. It won't foag the bleeders up for me.
How about fixing that kind of basic, old problem before coming to me with a new operating system?