I haven't gone to look at the script yet, but I thought I heard Fergus say "ok" in English? Silly nitpick, but it stuck out to me.
One thing that does bug me on the show is how quickly things pay off. Like Claire mentioned early on Mother Hildegarde's musical talents, and by the end of the episode they're already utilized for a major plot thing. I know there is so much to be covered, but it does make the events feel contrived when the thing they need is introduced and used in that same episode.
I'm wondering if the post-brothel fight is coming up next episode. They've certainly been r