title: Languages of Argentina
context: Argentina is predominantly a Spanish-speaking country — the fourth largest after Mexico, Spain, and Colombia (according to a compilation of national census figures and United Nations estimates, see List of countries with Spanish-speaking populations). Based on the 2010 national census and supporting research, there are about 40.9 million Spanish speakers in Argentina (almost the entire population).[3][4]
question: What language do they speak in Buenos Aires?
answers: Spanish