Do you NEED it? No. Will it make life a lot easier? Yes.
I spent loads of time trying to cobble together shareware or free apps to do what Toast does (I actually use Popcorn 3 and am very happy with it - Toast is overkill for me) and never got a useable solution. With Popcorn, I rip with MacTheRipper, then open Popcorn, de-select the non-English tracks, commentary, etc. then burn it to a video DVD. Works really, really well. Enough so that I'm kicking myself over the futile attempts at other solutions!