I learned how to lisp on Zs and many Cs and Ds, to drop the d in words that ended -ado so that all such words rhymed with Bilbao (our teacher hated us doing, this but that???s how the people all around us spoke including our teacher when she wasn???t concentrating), and to pronounce ll so it sounded more like a j then a y (this last one was our teacher???s fault too, haling as she did from Madri