Don't know if it's there but have a look in Gogdownloaderlinks and DL language pack.
Library
Game
More.

The game already has subtitles in spanish, both for Spain and Latin America.

I try searching the gog download page but the spanish option is not there, i upload a screen shot of my gog screen, any place i wasnt look?

so, there is no solution ?

Ok, man, you don't seem to understand, so let me explain you. Those languages you see there, are the languages used for the voices. Pick english, because I doubt you'll want to listen to Geralt speaking in german, or chinese, or portuguese, etc. It doesn't matter which one you choose, the game already has the subtitles, you can find them in the settings. I'll edit the post soon with a screenshot.

ED: Here is the screenshot. I downloaded the game in english, and then went to the "Language" submenu, and selected Spanish for "Text".

You are looking at the wrong place. That place you shown in the screenshot is for spoken languages. The option you look for is in Options->Language, but you can only change it before loading your game or creating a new one.

EDIT: Ninja'ed by @TBreaker20

You are rigth i was searching in the grong place, tanks a lot for the help :)