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.
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").