Re: "Changing language is hard, and it gets harder the better you are at what's being changed."
Saint Isidore of Seville was indeed a remarkable divine. But I suspect that the poetically modified quote here is the one widely referred to as the "prayer of Saint Francis" (of Assisi), even if not actually traced with any real certainty to him. Unluckily for Saint Francis, Mrs Thatcher used it - somewhat ironically - on the steps of No 10 Downing Street when addressing the press after winning an election. It's not yet really fully recovered from that experience, but in a hundred years time I wager that while no one will remember that detail, people will still be reciting it in English and in other languages. With a little effort it could no doubt be rendered in Perl, C, Rust or even COBOL. Q: which (after exhaustive and professional optimisation efforts) would win in terms of execution speed and resource usage ?