Being fluent in German and French this series should've been right up my alley.
Unfortunately its production value is similar to the one of many lower budget telemovies you can see at European public broadcasters.
I watched Deutsch-les-Landes with original voices. Later in the series most Germans talk German to the French and most French speak French to the Germans whilst everyone understands each other on the spot, that's definitely extremely odd.
It also leaves its viewers with major cliffhangers at the end of the last episode. I doubt there will be a second season, the first having been published in 2018, that's five years ago (although with the Corona crisis during that time).
I still give it a score over average due to the excellent play of most actors the many funny jokes and the many stereotypes you can encounter in real life in both countries.