Just to confirm that video files with multiple language subtitles cannot be chosen with webos 3.0, contrary to what you can do with any pc and any media player software.
The strict requirement that only one subtitle file with the exact same file name as the video file, does indeed limit to play a video file with the possibility of using just one subtitle file (or none).
Just to confirm that this is true. if so, I hope future upgrades of webos do not have this limitation.