Those not intimately involved in the whisky world may not have even noticed that whisky is spelled differently. It is all about the country of origin that determines whether it is spelled whisky or whiskey. Here is a breakdown:
whisky – this is when a drink is distilled in Canada, Scotland or Japan.
whiskey – the product is prepared in either the United States or Ireland.
This subtle difference is not apparent when pronouncing the words, but it is essential in writing.