The Germans have a poultry club that includes all of the breeds from the area. They have them all grouped into one club, and it seams to have a following.
I would like to see that here, to include all of the Spanish breeds. When collectively they could have more support than they would have on their own. I think such an effort could help lend credibility to the non standard breeds and varieties as well as encourage support for the standardized breeds.
As a whole there is some interest, but each on their own does not have much of a following.
Some of the characteristics that appeal to people that keep Spanish breeds is common among them.