English Spanish Sworn Legal Translator. There will be many situations where you may need a certified Spanish translator. Are you getting married in Spain or applying to a Spanish university? Are you considering buying property in Spain? Have you been appointed as an executor or administrator of an estate including Spanish assets under an English will? Do you want to set up a business in Spain? Are you a Spanish expat moving back? Then it is quite likely that you need to translate official documents for submission to Spanish authorities.