The language is usually described as Galician-Portuguese, which is from the other side of the Iberian peninsula from Catalonia, with Castilian in between. At the time, Castilian Spanish and Portuguese/Galician were closer than they are now, but Catalan was already very different (its closest relative is Occitan, spoken in southern France and northwest Italy).

We had a woman singing a modern song in Catalan in Sandy Bells last week. I can usually figure out something of Spanish or Portuguese, but couldn't make out a word.