Complex sentence: Lord Byron also felt great interest for Spain and was a reader of "Don Quixote" and translator of the romance "Ay de mi Alhama" in a part of his "Childe Harold", not to mention his "Don Juan".
Split into simpler sentences: Lord Byron also was greatly interested in Spain and was a reader of "Don Quixote". He translated the romance "Ay de mi Alhama" in part of his "Childe Harold" and "Don Juan".