SPAIN conquered most of Central America in the 1500s.
Central America is narrowest at that point
Central America, Mexico, the Caribbean and most of South America.
The official language in most of Central America is Spanish.
Costa Rica is the most popular destination in Central America.
Spanish is the most commonly spoken language in Central America, due to the region's history of Spanish colonization. It is the official language in all countries in Central America, with the exception of Belize where English is the official language.
Most of Central America has a temperate to tropical climate, although it can be colder in the mountain regions.
SPAIN conquered the vast majority of Central America and roughly half of South America.
If you mean central North America then it would be English, but if you mean central South America, and Brazil is the most central to the country then I would suggest language of Brazil or even Spanish.
Your answer depends on the part of America which is your beginning point -- North, Central or South America, and which part of Antarctica is your destination.
Spain
Latin America (Mexico and Central America, the Caribbean and most of South America).