Last I checked, a lot of the time this is entirely dependent on region. For eg. the Ghost in the Shell: Standalone Complex series on Netflix exclusively has English dubbing and English subtitles everywhere but Japan but changing these settings did not make the Japanese audio available anywhere else that I was able to find out. It's also very annoying that sometimes the only subtitles available are closed captions when I really only want dialog subtitles. It's a real pain that all dialog and subtitle options aren't available out of the gate for everything.