I am an Australian, first time author, intending to self publish. I have prepared the manuscript using the Australian English dictionary in MS Word. Many words are spelled differently in different countries. (Theatre/theater, colour/color etc) Also, as is the the convention in Australia and the UK, I have used single quotation marks at the beginning and end of dialogue, and double when citing a name, e.g. "The Pig and Whistle". This is the reverse of the American convention.
I want to market my book in all English speaking markets. Do I have to produce an American edition for the US market or can they be expected to cope with the UK/ Australian format in the same way that I have to cope with the US format whenever I buy an American novel?