Je was op zoek naar: formam (Italiaans - Engels)

per il chiaro proponimento di farsi capire da tutti, anche dai rustici et illiterati ormai ignari di latino, e di lasciare ai frati un'esortazione allorché si stavano allontanando dal suo originario e unico desiderio: vivere secundum formam sancti evangelii.
clearly because his purpose was to be understood by everyone, including the country folk and illiterates who, by then, knew no latin and to exhort his friars, ever more remote from his original and unique desire, to live secundum formam sancti evangelii (in accordance with the holy bible).