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.
Romance languages
Despite being the first Romance language to evolve from Vulgar Latin, Sardinian does not fit well at all into this sort of division. It is clear that Sardinian became linguistically independent from the remainder of the Romance languages at an extremely early date, possibly already by the first century BC. Sardinian contains a large number of archaic features, including total lack of palatalization of /k/ and /g/ and a large amount of vocabulary preserved nowhere else, including some items already archaic by the time of Classical Latin (first century BC). Sardinian has plurals in /s/ but post-vocalic lenition of voiceless consonants is normally limited to the status of an allophonic rule (e.g. [k]"ane" 'dog' but "su" [g]"ane" or "su" [ɣ]"ane" 'the dog'), and there are a few innovations unseen elsewhere, such as a change of /au/ to /a/. Use of "su" < "ipsum" as an article is a retained archaic feature that also exists in the Catalan of the Balearic Islands and that used to be more widespread in Occitano-Romance, and is known as "" (literally the "salted article"), while Sardinian shares delabialization of earlier /kw/ and /gw/ with Romanian: Sard. "abba", Rum. "apă" 'water'; Sard. "limba", Rom. "limbă" 'language' (cf. Italian "acqua", "lingua").