There are many cinemas in Barcelona, but the majority will show international films dubbed in Spanish or Catalan. Below is a list of cinemas that do show films in their original language with subtitles:
Filmoteca de Catalunya (Raval) https://www.filmoteca.cat
Cines Verdi(Gracia) https://www.cines-verdi.com
Cine Malda (Gotico) https://www.cinemamalda.net
Cines Renoir (Sant Antonie) https://www.cinesrenoir.com
Cines Melies (Exaimple) https://www.meliescinemes.com
Yelmo Icaria (Port Olympic) https://www.yelmocines.es
Boliche (Exaimple) https://http://bolichecinemes.cat/
Balmes Multi Cines (St. Gervasi) https://www.grupbalana.com/salas.asp?ID=8
www.salamontjuic.org (Outdoor Cinema in summer only)
ZumZeig (Sants) http://www.zumzeig-cine.eu/
Cinemes Girona (Exaimple) http://www.cinemesgirona.cat/
A different way to experience cinema is to visit CCCB in Raval. On their ground floor is the corner for Xcentric, a viewing library for experimental films. Xcentric also has a screening series for seldom seen films. Their program can be visited through the website.