It is said of a human group, of nomadic tradition, which shares an ethics, values, customs, traditions of several centuries. It is a marginalized social group, and as a transhumant people it has dedicated itself to trades considered minor, which have always suffered marginalization and discrimination to the point of becoming hermetic and developing their own language, a separate society, an ethnicity often endogamous (not always), and about whose origin there has been much speculation.
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