Glosses, i.e., explanations of technical terms marginally added to, or inserted into a text, can be found in the handwritten copies of some works by European Jewish philosophers going back to the 13th–15th centuries. The glosses are in Hebrew, in Arabic, even in Latin, as well as in some of the vernacular languages employed in the places and milieus where the texts were composed or copied: Spain, Provence, and Italy. The glosses were not always written inside or next to the text, but were at tim…