Most of the people speak German fluently . Another example is the Oktoberfest of Blumenau and many other towns in the region . Many towns , especially the small ones , retain notable aspects of German culture : in Pomerode , for example , a small town in which nine-tenths of the population is of German-Brazilian descent , most inhabitants still speak German fluently ; and Oktoberfest continues to be celebrated in Blumenau and in many other towns in the region .