In the seminary curriculum, moral theology doesn’t begin until after Latin 1-3 has been completed, and the seminarian has “tested out” of Latin (ie., year 4-5 in the seminary).

Just curious why, therefore, you would note that Alphonsus hasn’t been completely translated into English as a reason for the SSPX not to use him.

Ps: He has been translated into French (unsure of German, but probably), yet Econe preferred Merkelbach.

Sean
The amount of Latin they study at seminaries today is not NEARLY enough to read works in the language. My understanding is that most seminarians( by the time they finish Latin) can reqd the Vulgate with a lexicon. You can’t go through complex works ( like the work of St. Alphonsus) in Latin with so little training. They don’t have the time in the curriculum to get the seminarians really good in Latin.

If they now use Prummer, that is something new (Thanks for the heads-up!).

Formerly, the entire SSPX used Merkelbach.

Strangely, they never used St. Alphonsus.

I once asked Fr. Beck why, and he said he did not know.

It's the equivalent of not using St. Thomas Aquinas in Philosophy.

There are probably several reasons.  St. Thomas also isn't used as THE textbook.  That's partly because their respective works are so large that it was not possible to get through them in the normal seminary curriculum.  In addition, there have been developments since they wrote.  In particular, the 1917 Code of Canon Law had to be considered in the realm of moral theology.  Consequently, leading up the Vatican II, the "manuals" took over in the seminaries.  They were more succinct, concise, and up-to-date.  I'm sure that if a seminarian went on to more advanced studies, those would be required reading.  And of course, the better manuals quoted extensively from these saints, but also probably considered contrary opinions on various issues.

So, for instance, you wouldn't use St. Thomas to teach about the Immaculate Conception.  And there had also been many dogmatic definitions since his time, from Trent to the Immaculate Conception to Vatican I to the Assumption.

I asked 2 professors and several seminarians about BOD. They all articulated Prummer’s position

Again, saying it's "probable" doesn't mean all that much.  It simply means it can be held without being guilty of theological error.