Formal sub regions of Latin America and the Caribbean

This map shows the different sub regions of Latin America and the Caribbean. As you can tell it is almost impossible to create very distinct and clear boundaries that include all countries with the same color pin mark. My subregions are based off of the languages of Latin American and Caribbean countries. Spanish speaking countries, for the most part, are to the left of the yellow line on the map, but every country with a yellow pin mark speaks Spanish and is included in that sub region. Brazil is the only country in the Portuguese region and it is surrounded by the red border. The English speaking countries are mainly in the Caribbean and most of them are inside of the green line. However, all English speaking countries are marked with a blue pin. The last region is the French speaking countries, but since there are so few it is hard to plot out their region, however they are marked with a purple pin.