Hello ! Thank you for reaching out. It's a bug that I already encountered on an older windows version. It happens because during the development I updated some of the dialogues in the original French script and renpy is not able to find their new translations. I rewrote the corresponding translations for each line that I changed but I was not aware that it's still not working on mac because I could not beta test this version. 

I will try to search if I can correct it , and  for now, I will take down the mac version from itch.io 

I apologize for the inconvenience, if you are able to , please try out the game on your internet browser. I created this version for people who could not download or play the game directly on their computers. 

Thank you again for taking the time to write this post and warn me about it.