I totally agree. The information on the internet was very limited when I tried to locate Latin masses scheduled in my area. As I recall, one of them stated that the mass would be held “according to the Roman rite” and the second simply stated that it would be given “in Latin”. Both of the masses I attended this morning were Low Masses. I plan on attending another one this coming Sunday (again, strictly for the experience).
I cannot explain why I found it so jarring to hear the priest switch from Latin to German, but barring a sudden change of heart I will plan on only attending Latin masses in future.