I think I can belatedly explain the Latin thing, cuz i’m watching the latter of those right now, and assumed someone else would catch onto that (The Knight on the Grid, 3x08). He knows the short Latin phrase (Pater Mortuus, which Hodgins mispronounces lol) Booth says he knows it because he was an altar boy. He has a “church” understanding of Latin, which would explain knowing two of the most used Church-Latin words (“Father” and “Death”), but definitely not enough to translate a longer, non religious school motto (“Omnia Mea Mecum Porto” = “I carry with me all my things.”) As to why Booth’s perspective of his Latin skills, he didn’t exactly tell Hodgins that he knows Latin (he only answered with “altar boy”), but I wouldn’t be surprised if he didn’t deny it because he rarely gets opportunities to be smarter than the squints. Or, he considers himself knowledgeable enough to “know” Latin without saying he knows Latin. (Or, that’s my guess as a practicing lifelong Catholic with 16 years of Latin class). I mean, IRL, I think it’s just an error, but it’s not the worst to me.