My understanding, as was same with the other English speaking couple, on this tour today, it was to be an English speaking tour. We were joined with another couple, English was not their first language. Hence, on numerous occasions the guide spoke at great length in German, then a brief English interpretation was given. Both myself & the other English speaking couple spoke of our disappointment with the vast amount of German spoke, maybe we should just chat among ourselves. It's also worth noting, that three out of the five guests were the foreigners, we don't automatically know or remember names of places, mountains, rivers mentioned when asking again ...what/where do you mean? & Told, by the guide I mentioned all this before...
On the positive side of the tour, we arrived there & back safely. The location was stunning, very picturesque. The Alps are breathtaking.