Yeah, I think its main claim to being Spanish is the language and the fact that Fournier is Spanish.
From the booklet - "The cards are based upon original woodcuts dating from the year 1736--first produced by Guiseppe Ottone in the village of Serraville Sesia, province of Vercelli, region of Ligura-Piedmontese, Italy." Elsewhere I have read that the originals by Guiseppe Ottone are in the Fournier museum in Spain. As far as I know only a handful of images have been released. I'd be very interested to see them and discover how far the Spanish deviates from the source. I suspect La Sacerdotisa and El Sumo Sacerdotisa are significantly altered. No Papal hats! Surely Guiseppe Ottone, a good Italian, would not have made a bare-headed Pope.