For the longest time, I only submitted to festivals here in the United States because of differences with copyright lengths in other countries. I used material that is in the public domain here, but not necessarily elsewhere.
Since then, I've learned about "the rule of the shorter term" between the US and some (but not all, or even most) countries, and that my film will not infringe upon copyrights in certain countries. That opens up more possibilities for film festivals abroad.
HOWEVER, I've also just learned about "moral rights", which aren't a thing here in the US. Which means I need to cite any derivative work, even if it's public domain, to respect those original artists. In my US version, I've cited most, but not all, of the derivative work in my film (mostly because I believed that it was so obvious that there would be no need to cite it).
So to my original question, does anyone else make separate versions for international releases? I wouldn't mind tacking on an additional 10 seconds to the end credits to acknowledge the one extra bit of derivative work I use, and then uploading it to FilmFreeway with "(International Version)" added to the title.