Any good musician uses language as a series of stepping stones to pass personal expression on to the audience. It is what binds us together. So when the musician Curumin (KOO-roo-mean) performed at Denver’s Bluebird Theater this past Sunday evening, expressing himself in Portuguese, I was searching to find what binds us together.With 236 million speakers, Portuguese is the 6th most spoken language in the world, and a beautifully expressive one at that.