unfortunately I can't help, but what I can suggest is to look at the bike touring website , Crazy guy on a bike, and do some searching around for either the fuel name, or specifically some Spain searches and stove type and name searches.
Hopefully you might find some references.
When I travelled in Latin America, I used CGOAB journals as references for where I could find alcohol to use in my simple Trangia stove, and what types of stuff was available and how it burned etc.

In the end though, your stove is made to use reg gas etc so perhaps just go with one of the known fuels, although kerosene and gasoline are all going to have smell issues etc, but you may have to live with this, especially if you are concerned about the stoves functioning/cleaning/soot issues.

good luck, and if you are Spanish, buenos suertes hombre.