The sentence has a hint of sarcasm.
The writer may have moved to Florida for the warmer climate. However, what he found was that, with such a large proportion of the population being emigrees from Spanish-speaking countries (Puerto Rico, a USA protectorate, is practically just off the coast) it feels to him like he's moved to a part of a foreign country where the language and culture are different to what he's familiar with- and that was definitely not what he had in mind! It's like he's no longer in the real ' good ol' USA'.
Student or Learner