You’d probably be surprised by how much Latin you actually already use. Hundreds of words—like memo, alibi, agenda, census, veto, alias, via, alumni, affidavit and versus—are all used in everyday English, as are abbreviations like i.e. (id est, "that is") and etc. (et cetera, "and the rest"). Even some entire Latin phrases have become so naturalized in English that we use them, in full, without a second thought—like bona fide (literally "in good faith"), alter ego ("other self"), persona non grata ("unwelcome person"), vice versa ("position turned"), carpe diem ("seize the day"), cum laude ("with praise"), alma mater ("nourishing mother"), and quid pro quo ("something for something," "this for that").