South America is a continent comprising 12 sovereign nations: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela.
Latin America is a cultural/linguistic region encompassing all countries in the Americas where Romance languages (Spanish, Portuguese, French) predominate. This includes:
Thus, South America is a subset of Latin America. The term "Latin America" excludes English-speaking countries like the U.S., Canada, Jamaica, and Belize.