Multiple subtitles KMplayer, unlike VLC player, is the only supporting simulataneous subtitles. Learning languages watching a film with two subtitles is a good way to improve your listening and vocabulary skills.
Download KMplayer. Once it is ready to use open a film and then right click on the screen. Select 'Subtitles' and then 'Subtitle language'. Load the first subtitle and then repeat the same process and add '2nd subtitle'. You will be able to display them simultaneously in a movie.