Thank you to Léane for adding both “boot loader” and “bootloader” to the glossary.
Noé claims amorçage is widely understood. GNU GRUB is the most important bootloader to us and its terminology matters. Practically important is that users searching the manual for any of « chargeur d'amorçage », « chargeur de démarrage », « bootloader » find the manual sections. In my opinion, this is one more reason for chargeur d'amorçage, because démarrer has many meanings. Bootloader is mentioned anyway as the name of the bootloader field and variables. Searching « chargeur » then leads to the right places for amorçage and démarrage. Searching the complete term « chargeur de démarrage » occurs in one section concerned primarily with Btrfs along with amorçage. The term Démarrage is currently used sometimes in the concept index instead of amorçage. I will revert and then replace all these démarrage uses with amorçage. Regards, Florian