There are not an official translation. Please see the Spanish Official State Gazette: Boletín Oficial del Estado (BOE)
https://www.boe.es/
This document is a 2010 translation into English by Ministerio de la Presidencia. Secretaría General Técnica, 1 pdf, 30 p. (Colección: Administración electrónica).- NIPO: 000-10-075-0.
Technical Interoperability Standard for the Catalogue of Standards
= Norma Técnica de Interoperabilidad de Catálogo de estándares.
It is not an official translation and therefore has no legal validity. The original version can be found at the Spanish Official State Gazette (BOE): BOE 31/10/2012
. Translation published by: Ministry of Finance and Public Administration, 2012. NIPO 630-12-211-5