Referente al mapa que ellos presentan como "España" les explico que se la Corona monolingüe de Castilla. Y referente al idioma que la lengua de Castilla es el castellano.
Bueno, yo tampoco soy muy bueno con el inglés, que los que saben no tengan en cuenta mis faltas.
Dear Friends,
Please, see enclosed the map of the Castilian Historical Crown that refers to the people who speaks only the CASTILIAN language within the Iberian peninsula. It is the same land that you include in your posts as "España". As far as today, the name "España" refers to all kingdowns and recent "Autonomias" including catalans and basques.
The language of Castile is "Castellano", not spanish. All languages within the spanish Estate are spanish languages and the castilian is one of them.
The Castilian Kingdown as institution has more than 1200 years history.
I hope this heps you for a better understanding of the Castilian Nation.
Thaks for your time and regards,
··· 
