I note, as well, that in the French version, the title is not just Brokeback Mountain but The Secret of Brokeback Mountain. For me, this narrows the focus of the movie from the more general to the more specific - the fact that Jack and Ennis have to keep their affair a secret. I wondered whether the French version had more shots of Ennis and Jack as married men with children but I don't think this is the case. Nevertheless, after reading the French title, I became more aware of the domestic shots of Jack and Ennis in the French version than I have been when watching the English version.
By the way, an Italian Broke friend tells me that in Italy it's the English version of the trailer that gets shown though, obviously, dubbed into Italian. So it looks as though the French version was made specifically for the French market.