'Hispanic' was the term adopted by the government - by the Nixon government in particular - and that made the community feel it was being branded.
Historically, the 19th century is defined by annexations and internal turmoil. For instance, the Treaty of Guadalupe Hidalgo in 1848 gave more than half of Mexican territory to the United States.
There are varieties of Spanglish. There's Spanglish spoken by Cuban Americans in Miami called cubonics is different from Mexican American Spanglish, but thanks to the Internet, thanks to radio and television, thanks to what is happening in the classrooms, in the streets in the restaurants, we are finding a middle ground.
