I did a French version, but it's not perfect.
I took the Spanish version, searched for Spanish words (there are only 2) and replaced with French translation. The problem is that as line is splited in two buttons, each button can only have 14 characters which is not enough for French translation. So, what I did is removing French word for "device" as restarting usually refer to the whole system, and I removed the space between "restart" and "Luna".
I also swapped restart and restart Luna buttons. Restart Luna button is now at right of Restart button
Device Restart = Redémarrer
Luna Restart = RedémarrerLuna
It's not perfect, but it works.