Spanish

So I take Spanish class to refresh my memory on some of the stuff I learned in previous years and found that there was a lot of stuff I didn't know. Like I just learned the word "dardos" (darts) from a song.

So we were using a packet and the translation they wanted for "to go to the movies" was "ir al cine" but "ir a las peliculas" was another one students wrote. I was wondering how common and in what region that is said in?