Little things you may want to know to keep you out of trouble.
We speak Spanish / Español in PR, not Puerto Rican.
We are Puerto Ricans or Puertorricans, also Boriquas or Borinqueños (based on the Taino name for the island (Borinquen))
Never confuse us for Mexican or ask us about our Mexican food. Like you we do cook a taco or two but that is not our food.
Very few food items we eat have any heat on them and all dishes that have heat are by default available without heat. So only a few items will have heat once in a while. Our hot sauce is called "Pique" usually made with Whole Caballero peppers with water, vinegar, oil and spices. It is almost always available in any restaurant that serves local food, just on in case you want heat. We know what a jalapeño is but we don't normally eat them unless we are eating Mexican foods.
We are US citizens, we do not emigrate to the US, we just use our driver license to get on a plane.
Never insult the flag or the country, insult the government all you want.
While you are eating most people that pass by your table will say "Buen Provecho " it means good health basically, don't get aggravated by it, it is a strong culture thing you will have to live with. Say thank you, or Gracias or just nod your head. The more people walk by your table the more you will hear it.
When somebody wants to get by you the will say: "Con su Permiso" or just "Permiso" which translates directly to with your permission or excuse me. DO THE SAME, don't just push by. VERY RUDE.
Avoid being sarcastic, it can confuse people or aggravate them. Only use it with a GOOD friend. Say what you mean.
The. term Señor = Sir, the term Señora = mis, the term "Don" for males followed by your name or "Doña" for females is like sir or mis but normally used when you become part of the community, it is a respectful way for them to acknowledge that you belong.
Compadre (males) means godfather or also buddy, again they are being respectful, showing they care, same for Comadre (female). Also may be used to acknowledge you as en elder as in a tribe, not as you are old. Basically consider it means buddy.
Primo = cousin may also be used when addressing you, again it is respectful but in a more familiar way. Prima for female.
Papi = Daddy, they may use it for you but is less common, we are getting more familiar now. Mami = Mommy. Again we are getting a little too friendly. A lot of times it is used to show you regards just before they disagree with you are a way to try to not get you angry. Obviously between a father and a son or a son and a mother it is normal as it is in the US.
Most Puerto Ricans have no problem with being a JIBARO which is like a hillbilly, as a matter of fact they feel pride in it.
Learn these and you will go a long way.
BTW giving somebody the finger may get you shot just like in the states.