Can I use AI or Google Translate for a Spanish visa?

Real Decreto 724/2020, art. 17, gives the list. A translation into or from Spanish is official when it is certified by the Ministry of Foreign Affairs’ Language Office; made by someone holding the Ministry’s title of sworn translator; made or adopted by a Spanish embassy or consulate, for a foreign public document in a file it handles; or made by a foreign country’s consulate in Spain, for its own laws and public documents. Translations that EU law recognises as official also count.

A sworn translator certifies with their signature and seal that the translation is faithful and accurate (art. 18). That certification is what makes it official, and a machine translation has nobody to give it.

For a digital nomad application filed in Spain, the UGE-CE asks for the CV to be translated, where needed, “mediante traducción simple” — a simple translation — and does not say who must make it. For public documents it asks for a sworn translator appointed by the Ministry of Foreign Affairs, and for the rest of the file it says a sworn translation is enough.