Ferny,
I am in a similar circumstance and from what I have seen by some quick web searching is that; if you have previously satisfied the residency requirements, then you qualify for a shorter term (one year) to acquire citizenship. The Spanish lawyer would probably be a better source of information for this and I have not searched for official policy or regulations on this.
My situation is:
I was born in Spain in 1979 and resided there for three years.
My parents are (and were) both US citizens.
Neither of my parents were consulars or diplomats.
However, my father was serving in the U.S. Navy in Rota at the time of my birth.
I have documentation in the form of a US passport with a visa/exit stamp for Spain.
I am not sure, but, the “did not apply for their Spanish nationality within the legal period” portion may apply for your situation, as I think the “born in Spain, whose parents are foreigners legally residents in Spain” portion applies to myself…
Dave
The Spanish Nationality may be acquired in the following ways
1. By Birth
2. By adoption
3. By Residency
4. By registration
BY RESIDENCY
The period of residence may be 1 year those persons:
* who born in Spain, whose parents are foreigners legally residents in Spain.
* Whose spouse is a Spaniard.
* who did not apply for their Spanish nationality within the legal period established to acquire the Spanish nationality by option.
* Who are widowed of a Spanish national, provided that the spouses were not separated at the time of the spouse’s death.
* Who are the foreigner, whose father, mother, grandfather or grandmother were Spanish nationals by birth or residence.