My family emigrated from Mexico to California in the late 1800’s and early 1900’s. Some of them considered themselves Californians, not Mexicans. I am told the priority was to learn English in order to better their station in life. They knew that learning English was important if they were going to continue living in a new country.
I don't see that being the case with Spanish-speaking immigrants nowadays, though I am sure there are some exceptions. In our parish, we have the English and Spanish Masses, and the two groups never seem to be able to mingle.