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 people
Romani and Domari share some similarities: agglutination of postpositions of the second Layer (or case marking clitics) to the nominal stem, concord markers for the past tense, the neutralisation of gender marking in the plural, and the use of the oblique case as an accusative. This has prompted much discussion about the relationships between these two languages. Domari was once thought to be a "sister language" of Romani, the two languages having split after the departure from the Indian subcontinent but later research suggests that the differences between them are significant enough to treat them as two separate languages within the Central zone (Hindustani) group of languages. The Dom and the Rom therefore likely descend from two different migration waves out of India, separated by several centuries.