They may say that they will raise their kids as Americans, and they try, but it never fails that they also send their kids during summers to their grandparents on the island, who beat some old world and Catholic values into them and make them practice their Spanish language while they’re at it. :-)
Yet I know a Puerto Rico born obstetrician in Atlanta with hard line views on immigration and culture. Given a choice, he would make English our sole official language, make PR independent, and build not just a wall but a minefield on the border with Mexico.
Not all or even most Puerto Ricans on the mainland attempt to maintain a connection with the island. Many are scornful of Puerto Rico’s prideful backwardness. My friend Miguel, for example, says that he and his wife are raising their two sons “as Americans.”
It is useful to learn 2 languages and 2 cultures. It has even been shown that this adds a few IQ points to the young as they grow and develop.