Occitan, also known as lenga d'òc by its native speakers, is a Romance language. It is spoken in southern France, Italy's Occitan Valleys, Monaco, and Spain's Val d'Aran; collectively, these regions are sometimes referred to as Occitania. Occitan is also spoken in the linguistic enclave of Guardia Piemontese (Calabria, Italy). However, there is controversy about the unity of the language, as some think that Occitan is a macrolanguage. Others include Catalan in this family, as the distance between this language and some Occitan dialects (such as the Gascon language) is similar to the distance among different Occitan dialects. In fact, Catalan was considered an Occitan dialect until the end of the 19th century. 

Today, Occitan is an official language in Catalonia, where a subdialect of Gascon known as Aranese is spoken in the Val d'Aran. Occitan's closest relative is Catalan. Since September 2010, the Parliament of Catalonia has considered Aranese Occitan to be the officially preferred language for use in the Val d'Aran. 

Across history, the terms Limousin ("Lemosin"), Languedocien ("Lengadocian"), Gascon, and later Provençal ("Provençal", "Provençau" or "Prouvençau") have been used as synonyms for the whole of Occitan; nowadays, "Provençal" is understood mainly as the Occitan dialect spoken in Provence.
What subdialect is spoken there?
where a subdialect of Gascon known as Aranese