In his letter, +Worth issues various threats (called "norms"), explaining "I make these norms out of my pastoral solicitude and care for the students of Fisher-More College, as well as for your own soul."
As a well-regarded arbiter of moral issues, I have been asked, "Is Latin bad for your soul?" So here is some definitive advice on the degrees of sinfulness involved.
Latin or Soul? The great dilemma.
Slightly sinful: using expressions like "e.g.", "i.e.", "Q.E.D." and "R.I.P." in conversation (not realising that they are LATIN). You should certainly mention this at Confession.
Dangerously sinful: deliberately showing off with expressions such as ipso facto or persona non grata. Atone for this by making a pilgrimage on your knees to a holy place such as Fort Worth.
In peril of damnation: attending Mass and using expressions such as Gloria in Excelsis Deo, which God regards as a personal insult. Will probably be excommunicated, just as soon as they've got round to dealing with Enda Kenny.
Damned for all eternity: attending an Extraordinary Form Mass, similar to those celebrated by all Catholics fifty years ago. No hope of being saved!
Pope John XXIII: canonization cancelled after complaints from Bishop Olson.
I hope that helps.