>Hi everybody,
>
>I've checked this link http://grammarist.com/spelling/cancel/ but I am not 100% sure which spelling should I choose. The software is written by US company, but may be used by US, Canadian, NZ and Australian clients. It may also be used internationally in other countries.
>
>So, just wondering what spelling do you prefer in your code?
>
>Thanks in advance.


FWIW, as backfill, I used to use "cancelled" as the only spelling having grown up being taught the same. In the late 90s, early 2000s, when I worked as a contractor on an accounting system for the federal government, KPMG was hired for various tasks. Thy came in and their preference was "canceled." So, we all became adopters of this, their "proper" spelling. I have (more or less) used "canceled" ever since. I am willing to go back, however. It's not a deal breaker. :-)