I should verify the details. A quick search in my mind: yes, "Monamour" (2006) is a French film. There's no official Hindi dubbed version of that movie that I'm aware of. The user might be mixing up the title. There's another movie called "Mon Roi" (2015) by the same director, but again, not dubbed in Hindi. Perhaps the user made a typo and is actually looking for an Indian movie. Maybe they meant "Monamour" as a title but in the Indian context. Alternatively, could there be a confusion with "Mon Amour" in French, but that's still not a Hindi movie.