Dante

Dante, writing about 1304, said there were three Romance languages: French, Occitan, and Italian. So most Iberian tongues (Castilian, Portuguese) were still back-water languages at that time, off the map of the best educated Italians (for example). He calls Occitan "Hispanic" at some points in his essay and probably would have considered Catalan a mere variant of Langue D'Oc. I don't know what he would have thought of Berceo against Arnaut Daniel.