Instead of using well known dialects for the German dubbed version, the dubbing studio created a completely new fictional dialect with as much similarity to the original French ch'ti dialect as possible.
With 20.2 million viewers, it is the most successful French film in France. Former distinction holder was Don't Look Now... We're Being Shot At! (1966).
With 25.5 million euros, it holds the record for the highest first-week intake of a French movie in its home country. Former record holder was French Fried Vacation 3: Friends Forever (2006).
The belfry set had to be built in a studio as the real one was too small to allow a whole camera crew inside. Thanks to the movie's popularity and donations, the real belfry was refurbished after the release.
The actual Post Office in Bergues is located at 2 Rue Léon Claeyes, which is not the location shown in the movie. The building is similar but with particular differences. Still, most of the set locations are accurate.