With a POD of 1600, make the following states romance speaking majority by the year 1900 within a state that is not Romance Speaking (so English or Dutch essentially):
Arkansas
Louisiane
Texas
Mississippi
Florida
Alabama
Southern Georgia
Bonus points with a large variety with Portuguese, French and Spanish all represented.
Then a question, if such a large area is Latin speaking with French, Spanish and Portuguese but in a greater English state, would it be considered Latin America, as well as say Puerto Rico?