With the usual apologies for any cross-posting. The final piece of the jigsaw puzzle has been slotted into place regarding the provenance of the language and writing system for manuscript MS408. A new paper, titled 'Reintroducing a vanished Romance language' is available here: https://www.academia.edu/44261539/Reintroducing_a_vanished_Romance_language Enjoy and please disseminate to other scholars who may benefit. Kindest regards, Dr. Gerard Cheshire. Research Associate. University of Bristol.