Romani people
Most Romani speak one of several dialects of the Romani language, an Indo-Aryan language, with roots in Sanskrit. They also often speak the languages of the countries they live in. Typically, they also incorporate loanwords and calques into Romani from the languages of those countries and especially words for terms that the Romani language does not have. Most of the "Ciganos" of Portugal, the Gitanos of Spain, the Romanichal of the UK, and Scandinavian Travellers have lost their knowledge of pure Romani, and respectively speak the mixed languages Caló, Angloromany, and Scandoromani. Most of the speaker communities in these regions consist of later immigrants from eastern or central Europe.
Romani language
In a series of articles (beginning from 1982), Marcel Courthiade proposed a different kind of classification. He concentrates on the dialectal diversity of Romani in three successive strata of expansion, using the criteria of phonological and grammatical changes. Finding the common linguistic features of the dialects, he presents the historical evolution from the first stratum (the dialects closest to the Anatolian Romani of the 13th century) to the second and third strata. He also names as "pogadialects" (after the "" dialect of Great Britain) those with only a Romani vocabulary grafted into a non-Romani language (normally referred to as Para-Romani).