Tickets were all sold out in my language, but a few slots left in Italian. Not sure how interested we are in listening to a tour guide for 2 hours anyway, but there are skip-the-line benefits to paying extra by booking the official Vatican tour. From what I read in a similar thread on Reddit, this shouldn't be a problem and it happens all the time (particularly when some visitors don't speak any of the languages offered for the tours).
However, there also are earphones included with the official tours, which I imagine support selection of any of the languages that the tours are offered in, plus some additional ones? Curious if this should work so that we can at least get an audio recording in English of the tour's main presentations?