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
To some scholars, this suggests the form of Vulgar Latin that evolved into the Romance languages was around during the time of the Roman Empire (from the end of the first century BC), and was spoken alongside the written Classical Latin which was reserved for official and formal occasions. Other scholars argue that the distinctions are more rightly viewed as indicative of sociolinguistic and register differences normally found within any language. Both were mutually intelligible as one and the same language, which was true until very approximately the second half of the 7th century. However, within two hundred years Latin became a dead language since "the Romanized people of Europe could no longer understand texts that were read aloud or recited to them," i.e. Latin had ceased to be a first language and became a foreign language that had to be learned, if the label Latin is constrained to refer to a state of the language frozen in past time and restricted to linguistic features for the most part typical of higher registers.