Like its cousin indie, the term alternative has been used to classify a lot of different sounds over the years, especially as it spreads around the globe. But the essence stays the same: Music that offers us different ideas about how music can sound. Whether rooted in rock, dance or R&B, these Spanish-language tunes aren't just trying to nudge you in new directions—they're flipping the map upside down. Our editors regularly update this playlist. If you like a song, add it to your library.