Romani language
Romani (; also Romany; ) is any of several languages of the Romani people belonging to the Indo-Aryan branch of the Indo-European language family. According to Ethnologue, seven varieties of Romani are divergent enough to be considered languages of their own. The largest of these are Vlax Romani (about 500,000 speakers), Balkan Romani (600,000), and Sinte Romani (300,000). Some Romani communities speak mixed languages based on the surrounding language with retained Romani-derived vocabulary – these are known by linguists as Para-Romani varieties, rather than dialects of the Romani language itself.
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.