It's a French translation issue concerning the categories name when you add a new Data screen :
Select a category, and select one or more data fields.
In the French version, you have very similar categories : Vitesse which corresponds to Speed and another one Vitesses (with an 's') which corresponds to Gears in the English version which is very confusing.
I suggest to replace Vitesses (with an 's') by Transmission
Thank you
