A sworn translator is an official, certified translator. The only one who can perform sworn translations in Spain.
When will translations and interpretations from a foreign language and vice versa be considered official ? When they have been carried out by someone who holds the title of Certified Translator-Interpreter granted by the Ministry of Foreign Affairs, European Union and Cooperation.
Additional Provision 16 of Law 2/2014, of March 25, on the Action and the Foreign Service of the State indicates:
(…) those certified by the Language Interpretation Office of the chinese overseas europe database Ministry of Foreign Affairs and Cooperation, as well as those carried out by someone who holds the title of sworn translator-interpreter granted by the Ministry of Foreign Affairs and Cooperation, will have this character.
The Language Interpretation Office periodically prepares and publishes a List of all Sworn Translators-Interpreters who have been appointed by the Ministry of Foreign Affairs, European Union and Cooperation, indicating the language or languages for which they have been authorized to translate and interpret.

To be a sworn translator, you must obtain a sworn translator-interpreter qualification , which is awarded by the Ministry of Foreign Affairs and Cooperation. Without this qualification, you cannot work as a sworn translator.
To obtain the title, you must take one of the official exams that are held annually and meet a series of requirements:
Be of legal age, that is, be 18 years of age or older.
Have Spanish nationality or that of another Member State of the European Union or the European Economic Area
The minor must have a degree in Graduate/Bachelor's Degree, Diploma, Technical Engineering, Technical Architecture or equivalent in Spain, or a foreign degree that has been approved by the Ministry of Education, Culture and Sport.
There is also the possibility of taking the exam for sworn translators of Catalonia, the Basque Country, Galicia and the Valencian Community for the languages of the respective Autonomous Communities.