 Celtic languages are spoken in many parts of the British Isles today. These include Irish, Scottish Gaelic, Welsh, Cornish and the Manx language, native to the Isle of Man. Across the water, in north-western France however, a Celtic language is still spoken in parts of Brittany, known as Breton. The language was introduced into the region of Armoreca, known as Brittany today, by migrants from ancient Britain in the 5th and 6th centuries AD. Simply put, Celtic languages can be divided into two broad categories. Insular Celtic languages and older continental Celtic languages, such as Gaulish. Insular Celtic languages are subdivided into two categories, Gaulic languages such as Irish, Scottish Gaelic and Manx, and Brothonic languages such as Breton, Cornish and Welsh. As an Insular Celtic, Brothonic language, Breton is most closely related to Cornish than any other Celtic language. Today, Breton is still spoken, along with French, in western Brittany, whereas in eastern Brittany, the Romance language of Gallo is the most common minor language. In Brittany, there is also a Breton custom of bands playing bagpipes, thought to be a Scottish inspired tradition. Such a band is known as a bagat. A 2011 estimate suggested that 250,000 people could speak Breton, a significant drop from the 2 million speakers at the start of the 20th century. It is listed as a severely endangered language by UNESCO, and many of its speakers are elderly, although there has been an increase in recent years of children attending bilingual Breton French classes.