How to extract audio only one language from multi language movie?

i have movie moses which is a DVD movie of multi language. i want to extract only one language(audio) from it. bcoz i cant copy it and play in dvd player as it is 6gb part 1(as it is multi language). but i have only 2gb pendrvie. so i want to extract my language and copy it. so please show me a software(freeware) to extract one language audio from multi language movie.