I will be travelling soon on a 2-month pass but am likely to get back to my home country (France) well before its expiry date. I understand that I cannot travel any more in France with it, but can I then make my own way to a neighbouring country and continue to travel there as long as the pass remains valid (without of course attempting to return to France using the pass)?

The more I think about it, the more it seems possible, unless there is a clause stating that travel must end on return to the home country.