The term 'European Language Group' refers to two distinct language families, Indo-European and CELTIC. Indo-European is a large family of languages that includes most of the languages spoken in Europe, as well as many languages spoken in other parts of the world. CELTIC is a smaller language family that is mainly found in the British Isles and parts of France. Both language families have been around for thousands of years and have had a significant influence on the development of European culture.