Native Language and Handbrake!
Handbrake is one of my favorite Mac freeware. When you extract a DVD with Handbrake, you can choose which audio track you want to extract and add to the resulting QuickTime video. It selects English by default, but what if your native language is not English and you would like another language as the default language. It is possible to change that in Handbrake preferences, under Audio. You can get Handbrake here from MacUpdate.