"Salve, amica." Latin is a dead language that was mainly taught in parochial schools "back in the day". I have never met one other person who took Latin in school besides myself. That's why I probably wrote "hello, friend" incorrectly. "Mea culpa, mea culpa, mea maxima culpa." "Pater noster, qui est in caelsis. Sanctificator nomen tuum. Adveniat regnum tuum." It's been years. I understand. I love Latin as well. Thanks for reminding me. Edit. Cool user name!
So that more people can read them. Very few people can read and/or speak Latin anymore- mostly just clergy and a few college professors. If you publish in the vernacular, then millions and millions of normal people can read it.
Because almost no one understands or reads Latin. Latin texts were originally translated into english to make them more understandable and therefore more accessible to the average person. Before that only priests and church officials and a few rich people could read Latin texts after the fall of the Roman empire.