If you want to do multiple audio and subtitle tracks, such as you would with language dubbing or subtitling, then these are often included. The standard film DVD used by a production company offers eight to nine audio tracks and over thirty subtitles. This is unnecessary for most home digital video producers, but it is a thought. Again, if you are trying to create a DVD project that is more than just a display for your film then you may want to consider this. If you are trying to give it to friends and family that have a distant nationality, then this may help bridge the language barrier.