I made the translation of fr.php
In fact, I've retrieved en.php and translated all the occurrences and I don't know if it's the right method.
WARNING: It is operational but still needs to be improved and I will only find possible errors with use.
If you have French people on the forums, ask them to install it and report what's wrong.
On the other hand, I opened a tutorial space that I intend to feed as I discover new things with CMSimple.
The goal is to learn how to use it and to propose my tips to those who like me start with this CMS.
Have fun !