Hi Moonraker12, I did the map for the province of Bolzano - it was done to show how the Italian/German distribution has changed over the last century History_of_South_Tyrol#Linguistic_and_demographic_history - as for Trento: I do not even know if in Trentino they go around and ask everyone about their language - in South Tyrol they do it every 10 years. So there is plenty of linguistic data and on that a map can be drawn. As I said - I do not know if such data even exists for Trento...