With the amount of Latin people in America, its much easier for them to come to American than the Asian players or even Americans going to Latin America. Especially when they first start in the GCL/AZL. There are some places in FLA that you can't go unless you speak spanish. Heck, at Verizon stores in FLA they have spanish speaking people that work there, take a drive down 9th street towards Mckecknie and you will see a car dealership that has a sign "se habla Espanol" also they have a Hispanic food sectional in almost all Walmarts around the country. You wouldn't find signs in the Dominican (the real DR not the resorts) saying "we speak english here" And in response to him saying Latin prospects are "too old at 16 or 17" to sign, that is in Latin years, so that really means 20 or 21 in American years.
Florida is pretty much the ideal destination for a Latin American minor leaguer for the reasons you give. But most of the US would be much more difficult. As someone else mentioned, the movie Sugar is a really interesting look (although I can't say if it's accurate) at the life.
Nobody gets
me a translator when I go to Florida.