After checking, it is a translation issue.
Sorry for those who have make the french translation, but french translation is quite bad, wrong in a lot of places, and finally misleading.
Just some examples (I indicate the english translation of the french translation):
Sticky Navigation is translated by “Navigation display”
Content title is translated by “Title content”(!!)
On is translated by “Opened”
Off is translated by “Closed”
…
On https://translate.wordpress.org/projects/wp-themes/generatepress/ French translation is marked 100%
I went on https://translate.generatepress.com/glotpress/projects/gp-premium to get the .po french file, and translation is 83%, not 100%
I will be happy to make a “good” french translation and share it.
Regards
Thierry