Dear Editor, As a Galego, I feel compelled to explain the presence of "incongruous Celtic" music that can be heard in the movie The Sea Inside [Film Listings, Feb. 25]. Galiza is a Celtic nation (www.celticnationsworld.com), and Galego is spoken by more people than those speaking Euskera. Not to mention that walking along Galician streets gives you the opportunity to hear some nice bagpiping. I hope this helps to clarify the "incongruity" of the music.