The ''Lunfardo'' argot originated within the prison population, and in time spread to all ''porteños''. Lunfardo uses words from Italian dialects, from Brazilian Portuguese, from African and Caribbean languages and even from English. Lunfardo employs humorous tricks such as inverting the syllables within a word (vesre). Today, Lunfardo is mostly heard in tango lyrics; the slang of the younger generations has been evolving away from it.