I saw this question today:
It was something I'd seen before (maybe it's already been asked on SciFi.SE?), but I thought to myself "the information I've seen was about the books, but this is Movies.SE, I wonder if the movies made similar changes".
However, none of the answers actually mention the movies specifically. One of them specifically mentions the books. From the given answers, I cannot tell what the French version of the Harry Potter films does when referring to Voldemort.
It seems to me like this is a problem. Either the question needs to be more specific (OP does not specify if he means books or movies), or should be closed/migrated because it's not about movies, or questions about books that have movie adaptations are on-topic here.
I'm not very active on this stack, so I don't know how you guys handle things here. But I didn't see any discussion on these potential issues in the main question, so I thought it'd be best to bring it up here.