The word Celtic refers to an ethnolinguistic population and languages that have been and to a smaller extent are still used in Europe. Today, there are still four places that speak Celtic languages: Ireland, Scotland, Wales, Brittany (in France), Cornwall (in Engliand) and in the Isle of Mann. The six surviving Celtic languages are Irish, Scottish Gaelic, Welsh, Breton, Cornish and Manx.
There are two ways to pronounce the word Celtic in English: Sel-tik and Kel-tik. Both pronunciations are considered correct, but kel-tik is how it is usually pronounced. When the word came into use in English, it was derived from French and it was usually pronounced as Sel-tik. However, in the latter half of the 20th century, the predominant pronunciation became Kel-tik, which was how the word was originally pronounced in Ancient Greek and Latin.