Amalgamation:

Writ LARGE.

So I am in the grocery line checking out yesterday....

Ahead of me is a dude of obvious Chinese descent buying Corn Tortillas, Swiss Cheese, and Corned beef.
I commented on the mix.
He smiled and said the Russians he worked with had given him the recipe for  "Irish Tacos".

Think on it.......
This is supposed to be how America works.

Not enclaves where they don't speak English at all.