Well, it does specify those older than 5 probably because anyone younger than 5 can't really be considered fluent in whatever language they're learning barring extreme cases so that would account for some of them
The caveat doesn't say it isn't included because it isn't part of the USA. It probably isn't included because virtually everyone in PR speaks Spanish in the home.
I don't necessarily disagree, cities in Puerto Rico probably should be included on some US cities quizzes. I don't think so on this quiz, though. The point is to guess cities where Spanish is not the main language, but that have large Spanish speaking populations. If you included PR, five cities would make this list. Also, I was mainly calling out Bilzzrd's incorrect assumption that PR wasn't included because it isn't considered part of the USA. The fact QM listed it in the caveats shows he knows it's an American territory and is excluding it for some other reason.
The U.S. Census Bureau keeps separate statistics for territories, so Puerto Rico, Guam, etc. are almost always left out of tables not specifically pertaining to territories.
for a total of 122502.9 (home) Spanish speakers.
Quiz cut off is 123K. Darn the luck.
This source claims 49.2% of the population is Hispanic, which suggests more than half of those either:
* don't speak Spanish
* speak Spanish, but
+ speak English at home
+ speak some other language at home
+ don't talk at home
- I will leave it to the reader to speculate why
Puerto Rico's in America