Given that Ralph McInerny's book What Went Wrong with Vatican II: The Catholic Crisis Explained has recently been bandied about (see Who Said: "God Did Not Become Man in Order for Man to Become a Theologian''? and What is meant by "Catholic Truths" in Ott's «Fundamentals of Catholic Dogma»?), I would like to point out that at the beginning of that book on pg. 7, one finds:
It is forgotten now that early in his papacy he [Pope John XXIII] issued a directive requiring Latin to be fully restored as the language of instruction in seminaries and pontifical institutions.
QUESTION: Specifically, what was the directive of the said Pope fully restoring Latin as the language of instruction in seminaries and pontifical institutions; and was it ever followed? What is its status today?