ترجمة - إسبانيّ -انجليزي - Se trató de una música eminentemente popular,...

It was a mainly popular kind of music, rejected and forbidden by upper classes, and that's why it spread in the suburbs, ports, whorehouses, taverns and jails, where immigrants used to converge.

Hi JENNQ,

"suburb" is a false cognate for the Spanish word "suburbio".

They have different meanings.

(English) suburb = an outlying residential district of a city (not a poor one).
(Spanish) suburbio = village or group of houses near a big city, where the poor class lives.

poor outskirts = the outer parts of a town or city where the poor live.