“What % of people in rural NH speak only spanish?”
I have no idea, but a LOT of people in rural NJ do (they work on the farms; we see them when we take the kids to get pumpkins for Halloween). In my area (northern NJ), lack of Spanish/Portuguese makes it almost impossible to get a job that deals with customer service.
Lack of English should make it 100% impossible
In southern nh there are many Hispanic areas. The bottom half of NH is just a Boston/Portsmouth/Manchester suburb.
Way up north in the rural areas you have the standard couple of stores in every couple of towns.
there are farms in NJ?