the 'celtic' peoples stretched from the ukraine to britain, north of the romans, and included cletic gaul and parts of iberia. their culture included a very artistic talent, as well as a vast trading network from one side to the other. the romans considered them 'uncivilised' in the original meaning of the word, they did NOT live in cities, and they dis not speak latin or greek which made them unintelligable and their language thusounded like bar-bar-bar nonsense, so they were barbarians.
see my PM.