Hispanics make up the fastest-growing immigrant population in the country, and the Latino vote is considered a crucial bloc for the November presidential election.

CNN: STORY HIGHLIGHTS

Sao Paulo, Brazil (CNN) -- In the heart of Sao Paulo, Brazil's largest city, the Little Peruvian Corner turns out spicy lomo saltado -- or jumping sirloin -- for a fast-growing immigrant population.

CNN: Booming Brazil lures immigrant workers

Those are tiny numbers compared with the four million students studying Spanish in this country, but Mandarin's appeal is growing, both because of economic prospects and because of an expanding Chinese immigrant population here.

NPR: Chinese Classes Grow in Popularity with U.S. Students

Even if Germany and the other European Union countries can prevent the immigration population from growing -- and that is a very uncertain if -- they must find ways to deal with integrating the immigrant population already present, both first- and second- generation.

CNN: Germany's Merkel is right -- multiculturalism has failed