Play 2 subtitles at the same time

It would be very useful when learning languages to be able to display 2 different subtitles at the same time. At the moment no player for linux and mac does the job. There is also a very old ticket but the feature has been ignored for a long time so I open this ticket...

http://forum.videolan.org/viewtopic.php?t=21558 https://trac.videolan.org/vlc/ticket/824