Who is considered a boricua?

: a native of Puerto Rico or a person of Puerto Rican descent Rita Moreno has been making headlines in the entertainment industry for over 70 years.

What siento means?

Siento = from the verb sentir, or “to feel,” conjugated in the yo form.

What is De nada mean?

youre welcome : of nothing : youre welcome.

How do you reply to Lo siento?

In english you would usually reply with thats ok or no worries.