Spanish-to-English translators are often called upon to translate a variety of notarial documents. An excellent source for understanding the terminology of notarially-recorded instruments and lots of basic Civil Law concepts is the Glosario de Términos Notariales available on the website of Spain’s Consejo General del Notariado at http://glosario.notariado.org/ .
The site also offers a series of folletos informativos covering many of the areas of private law in which notaries intervene: http://www.notariado.org/liferay/web/notariado/folletos-informativos .
And, finally, the Consejo publishes a searchable online magazine Escritura Pública featuring a variety of articles that seek to serve as a punto de encuentro entre este colectivo y el resto de la sociedad: http://www.notariado.org/liferay/web/notariado/publicaciones/publicaciones-periodicas/escritura-publica .