Bolivian Spanish word
la casera
Meaning: the market vendor (a respectful, familiar term of address)
How it is used in Bolivia
How you address and refer to the woman running a mercado stall; used often, it's part of how rapport builds over repeat visits.
Returning to the same casera visit after visit is what the mercado runs on, she remembers you, and that memory is worth more than any single sale.
Learn it in a real situation
Host Your Bolivian Family, Practical Spanish