I've thought about that too, but I am not quite sure. Others said it could be a Canary Island Dog since they are very common in Spain, especially in the south.
He loves to run and he is quick, when he is outside without a lead in the forest or something, he tries to play with every dog and runs around being very excited. When he is inside the house, he is mainly very calm and doesn't run around or jump. I would say yes he is energetic, but more in a balanced way.