I believe the Council of Trent answered this in 1546. There you have a general council teaching on a matter of faith. That makes its teaching infallible. That is good enough for me. How about you?
I have no problem with the Council of Trent.
These are extracts from a couple of Catholic encyclopedias.
The Catholic Encyclopedia (1912)
newadvent.org/cathen/15030c.htm
“After exhaustive preliminary discussions in the various congregations, two decrees were ready for debate at the fourth session (8 April, 1546), and were adopted by the fathers. In treating the canon of Scripture they declare at the same time that in matters of faith and morals the tradition of the Church is, together with the Bible, the standard of supernatural revelation; then taking up the text and the use of the sacred Books they declare the Vulgate to be the authentic text for sermons and disputations, although this did not exclude textual emendations. It was also determined that the Bible should be interpreted according to the unanimous testimony of the Fathers and never misused for superstitious purposes. Nothing was decided in regard to the translation of the Bible in the vernaculars.”
The New Catholic Encyclopedia 2nd edition. The entire article is accessible via
highbeam.com/doc/1G2-3407711646.html
“As recently as 1941 a long letter had to be addressed
by the PONTIFICAL BIBLICAL COMMISSION to the archbishops
and bishops of Italy to put them on their guard
against an anonymous attack, made earlier in the year,
upon the scientific study of Scripture, that claimed justification
in the Tridentine decree Insuper (Enchiridion symbolorum
3794; Encyclopedia biblica 526). This letter,
issued under the authority of Pope Pius XII, and especially
two paragraphs of the same Pontiff’s encyclical of September
1943, DIVINO AFFLANTE SPIRITU (par. 21–22;
Enchiridion symbolorum 3825; Encyclopedia biblica
549), state plainly the meaning of the council’s use of the
term ‘‘authentic’’: that the decree applied only to the
Latin Church and to its public use of the Scriptures; that
it diminished in no way the authority and value of the
original texts, Hebrew or Greek; that the decree in effect
affirmed that the Vulgate was free from any error whatever
in matters of faith and morals and so could be quoted
with complete authority in disputations, lectures, and
preaching—that, in short, the term had been used primarily
in a juridical rather than a critical sense; and that there
had been no intention to prohibit the making of vernacular
versions from the original texts rather than from the
Vulgate.”
I decided to practise my cut and paste.This is Acts 1:26 from a few English translations.
NAB Then they gave lots to them, and the lot fell upon Matthias, and he was counted with the eleven apostles
NAB(RE) Then they gave lots to them, and the lot fell upon Matthias, and he was counted with the eleven apostles.
GNT Then they drew lots to choose between the two men, and the one chosen was Matthias, who was added to the group of eleven apostles.
DR And they gave them lots, and the lot fell upon Matthias, and he was numbered with the eleven apostles.
KNOX They gave them lots; and the lot fell upon Matthias, and he took rank with the eleven apostles.
CCB Then they drew lots between the two and the choice fell on Matthias who was added to the eleven apostles.
JB They then drew lots for them, and as the lot fell to Matthias, he was listed as one of the twelve apostles.
NJB They then drew lots for them, and as the lot fell to Matthias, he was listed as one of the twelve apostles.
NEB They drew lots and the lot fell on Matthias, who was then assigned a place among the twelve apostles.
RSV And they cast lots for them, and the lot fell on Matthi´as; and he was enrolled with the eleven apostles.
NRSV And they cast lots for them, and the lot fell on Matthias; and he was added to the eleven apostles.
KJV And they gave forth their lots; and the lot fell upon Matthias; and he was numbered with the eleven apostles.
NET Then they cast lots for them, and the one chosen was Matthias; so he was counted with the eleven apostles.
NIV Then they cast lots, and the lot fell to Matthias; so he was added to the eleven apostles.
CEB When they cast lots, the lot fell on Matthias. He was added to the eleven apostles.
RSV2ce And they cast lots for them, and the lot fell on Matthi’as; and he was enrolled with the eleven apostles.
I don’t see a problem with 12 apostles. It appears to be more of a problem in understanding English as opposed to understanding Greek or Latin. The idea of 12 apostles is the same in all of these translations.
Infinity is hard for me to get my head around but 12-1=11 and 11+1=12 is fairly easy to grasp.
12 apostles - 1 apostle (Judas) = 11 apostles.
11 apostles + 1 apostle (Matthias) = 12 apostles.
If you wish to believe that Matthia was not added to the eleven apostles then so be it.
I still remain somewhat curious though. Do you have a list of “inerrant” bibles? (preferably in English translation) If you can supply this, it would be a wonderfull help not just for Catholics.