Outsiders are frequently surpised that Koreatown's residents are mostly Spanish speakers. Korean professionals like dentists and  entrepreneurs moved to safer neighborhoods in the wake of the race riots in the 90s. They commute to Koreatown during the day to run businesses and employ Mexicans and Salvadorans for the manual labor.  Many Koreans have enough business savvy to realize that there's a Spanish-speaking market, albeit still low in income, that can be tapped into. You can find authentic products from Mexico at the Korean supermarkets!