Time ago I installed H&D 1 in Spanish, but sadly had to hard reset my pc, and lost installation disks, so I bought a license here in gog. Now I'm surprised that only have an English version. Can I download a Spanish version of this game? How can I do that?

My guess is that the gold version/action pack version never was translated to spanish but honestly I am not sure.
Anyway the deluxe version was translated to spanish, voices and text. You have it available under extras/goodies. It is a later different version with its pros and cons.

Greetings.