None of those words are any more overused than their more modern equivalents would be, though. 'Pray' as a replacement for 'please', 'mayhap' for 'maybe/possibly/perhaps'. 'Anon' ('later'..ish...) you could make an argument for, but only because the way it's used isn't how people typically construct a sentence these days?

I would have liked to see the Domans written differently; if not slightly more modern, than at least a somewhat simpler form, to show that while they're fluent, it's not their native language. I can live without it, though!

I'm also deeply disappointed that (early SB spoilers)
the Garlean national anthem was in English (Even with the Japanese track on) rather than Latin, since everything else about them is so Romanesque it hurts. In my heart it's only because The Echo is translating it for us, though.