Well, Catalonia is in Spain. Catalan is a language spoked in Catalonia, Valencia(called valencian
, my avatar is the land of València.) and Balears Islands. But catalan/valencian isn't a dialect of spanish, is another language, with different grammar and vocabulary.
I'm valencian, and there is differences of spelling and vocabulary betwen catalan of Catalonia and catalan of València, also called valencian. Well, is more complex, but this is a general explanation.
Is the same like portuguese of Portugal and Portuguese of Brasil, and i think the same between german of upper-Austria and german of Vienna.
This file is catalan of Catalonia, because has the catalan pronunciation:
Per exemple, when the virus.data is updated you can hear:
La base de dades de virus ha estat actualitzada corretament.
Cat pron.: (the pron. of the file)
la basa da dadas da virus ha stat actualidzada curractamen.
Val pron.:
la base de dades de virus ha stat actualizada correctament.