OK. So the data blurb does confirm English language. However, it does not specify whether it is dubbing or subbing, so that doesn't really answer anything.
Also, Mill Creek is producing its own English
DUB of the 3rd film??? Seriously? Or are they just doing new subtitles??? This last claim really has my guts in a knot. It would be amazing to have all 3 films dubbed, but I have a hard time believing a company would go to the expense of dubbing a 45 year-old film, given the shrinking market (at least if you believe everything you read & hear) for DVDs. But then of course I pray on bended knees that I am very, VERY wrong about that!!!
