Something similiar happened in the Dominican Republic. If someone didnt speak their "pure language" they were butcherd.
Though it occurred just hundreds of miles from Miami, the Parsley Massacre is one of the least-known acts of genocide in the 20th century. The killings took place in the Dominican Republic, which shares the small island of Hispaniola with Haiti.
In October 1937, Dominican dictator Rafael Trujillo ordered the indiscriminate killing of Haitian migrants along the countries' border. To differentiate between black Dominicans and Haitians, so the story goes, soldiers obliged rural workers to say “parsley” ( perejil in Spanish). Pronouncing the “r” is difficult for native Creole speakers, and failure in the linguistic test could mean execution. Between 9,000 and 20,000 Haitians died over a five-day span, an episode that then-U.S. ambassador in Santo Domingo called “a systematic campaign of extermination” in a communiqué to Franklin Roosevelt.