Ya d'ar brezhoneg is a campaign launched by the Ofis ar Brezhoneg

Ofis ar Brezhoneg

The Public Office for the Breton Language was established on 15 October 2010, in place on the Ofis ar Brezhoneg/Office de la langue bretonne created on 1 May 1999 by the Region of Brittany in France for the promotion and development of the Breton language....

 ("Office of the Breton language") in order to stimulate the use of the Breton language

Breton language

Breton is a Celtic language spoken in Brittany , France. Breton is a Brythonic language, descended from the Celtic British language brought from Great Britain to Armorica by migrating Britons during the Early Middle Ages. Like the other Brythonic languages, Welsh and Cornish, it is classified as...

 in daily life in Brittany

Brittany

Brittany is a cultural and administrative region in the north-west of France. Previously a kingdom and then a duchy, Brittany was united to the Kingdom of France in 1532 as a province. Brittany has also been referred to as Less, Lesser or Little Britain...

, western France

France

The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

. In the first phase, started on 5 October 2001, civil society

Civil society

Civil society is composed of the totality of many voluntary social relationships, civic and social organizations, and institutions that form the basis of a functioning society, as distinct from the force-backed structures of a state , the commercial institutions of the market, and private criminal...

 was targeted. Over 560 enterprises and organisations have signed the agreement to support the use of Breton. In the second phase, started on 22 December 2004, the communes

Communes of France

The commune is the lowest level of administrative division in the French Republic. French communes are roughly equivalent to incorporated municipalities or villages in the United States or Gemeinden in Germany...

in Brittany were targeted. Communes promote the use of Breton for instance by installing bilingual (Breton and French) road signs and bilingual promotion posters for events organised by the communes.