Tunisian dinar
The dinar (, , ISO 4217 currency code: "TND") is the currency of Tunisia. It is subdivided into 1000 milim or millimes (). The abbreviation "DT" is often used in Tunisia, although writing "dinar" after the amount is also acceptable (TND is less colloquial, and tends to be used more in financial circles); the abbreviation "TD" is also mentioned in a few places, but is less frequently used, given the common use of the French language in Tunisia, and the French derivation of "DT" (i.e., "").
National language
The official language of the Tunisian state is Arabic. However, that language is not the mother tongue of the population or used to communicate between Tunisian people, instead Tunisian Arabic plays these roles and is the national language of Tunisia. Also, even without an official status, French is also used extensively in its written and spoken form in the administration, education and business environment and known by 63.6% of the population. Also Berber minorities in the south-west and on Djerba Island use the Tunisian Chelha language to communicate between themselves.