FWIW, regarding the Blu-ray, Project Threepio is big enough that including all of the subtitles, plus multiple lossless tracks, may put you over the 8Mbps Blu-ray limit for non-video data and cause bad player behavior. Just something to keep your eye out for. I used to include 5 lossless tracks (and a bunch of lossy tracks) with my personal Blu-rays and that finally sent it over with the most recent versions, so I cut it back to 1 lossless track and lossy versions of the same other tracks--you could also obviously opt to exclude some subtitle languages too. I never did the calculations to figure out what the actual safe values were.