Below are some very commonly-found phonological phenomena in Puerto Rico, and in the Puerto Rican diaspora

‘r’ pronounced like ‘l’ at the end of a syllable (“trueque de líquidas”)

a…a lo largo del Mar Caribe

Weakening of /s/ sound at the end of a syllable:

una vez, o dos veces al mes

backed pronunciation of ‘r’ at the beginning of a word, ‘rr’ between vowels or ‘r’ after ‘l’, ‘s’ or ‘n’ (“la erre arrastrada”)

y ella me responde

regular

Yes-no questions with falling intonation

¿Entiendes? (this example also includes /s/ weakening)