You know Latin, whether you know it or not, or like it or not. A large percentage of English vocabulary is directly imported from Latin, or through the French language.
Here's a good quote from http://www.tldm.org/news5/latin.htm (I only use the quote - the website advocates a so-called "Marian apparition" that is not approved by the Church)
At a time when the Church is passing through an era of crisis and a period of doctrinal disarray, when the centers of higher learning proclaim themselves independent of the Holy See, a remark of Dom Gueranger, O.S.B., on the use of Latin, written more than a century ago, may gain again some curious significance. "The hatred of the Latin language is innate in the hearts of all the enemies of Rome; they perceive in it the universal bond of all Catholics and the arsenal of orthodoxy; against all sectarian subtleties..." (Inst. Liturg. I 402) The same thought appears in the Encyclical Mediator Dei (#60): "The use of the Latin language ... is a manifest and beautiful sign of unity as well as an effective antidote for any corruption of doctrinal truth." So it is no coincidence that the doctrinal dissenters, the moral muddlers and the loathers of Latin are lodging at the same address. (Homiletic & Pastoral Review, March 1991, pp. 64-65)