When I want to watch a BD movie with subtitles, I usually play it though my PC and add srt subs, because most BDs have really awful subtitles, not in terms of quality but in terms of size and placement - they are usually way too big and with 2.35:1 movies the first line is usually in the picture, while the second line is in the black bar, which IMO is the worst placement of subs you can have, because it totally breaks the cinematic feel - either put them in the picture, which is the way subs would appear in the cinema and it also makes them easier to read while also watching the movie (provided they have a black outline), or keep them in the black bar, so they don’t intrude in the image.