It doesn't matter what country you live in, if you sell your product in the US (and who doesn't with digital content in english?), they can sue you in an american court.
Good luck with them dragging you from your home country to America, just to go to court. ;)
I don't think that would happen...
Sure, if you choose to visit the US in the future, it might be an issue.
Edited by lonewolff, 23 July 2013 - 02:37 AM.