A street musician in San Telmo performs for the crowds. While Argentina is known for it's tango even for the country's Spanish speaking people it's lyrics are difficult to understand. The words that are used in the lyrics evolved themselves among thieves and in prisons around 1900. It was a slang that mixed Spanish, Italian and Genovese words in order to create a new language. Called Lunfardo, the slang helped Buenos Aires' underclass to communicate without the authorities knowing what they were talking about.