How can I select which language/version of a TV series I want to purchase?

If I search for a TV series, and try to purchase, the Apple TV app won't show me which language/format that I'm trying to buy. If I select individual episodes, I can see that there are different formats/versions available, but again, there's no real indication of which language/format each on is.

In this case, I'm trying to buy Season 1 of Battlestar Galactica, but it's impossible to select which format I want.