I didn't get a lot of truck watching done in Spain, but I did see an incredible variety of manufacturers. Many more brands of trucks and buses on the road in Spain than in North America and of course most trucks are COE/ CF models. In fact I didn't see a "bonneted" truck the whole time.
Here's a sampling of big size trucks:
Another thing to note was the super single tires on trailers, and smaller sized tires on many rigs.