Why Spanish is widely spoken at home in the American Southwest other than immigration?

The Spanish-speaking population in the U.S. is on the rise. This is because of the rapid growth of Spanish-speaking immigrants from different places such as south America, and partially due to Spanish-language education in U.S. primary and secondary schools. Most students are required to take a language, and the most favorable is Spanish.

demand is the need and oportunity to buy a given good or service.