One of the things this book did surprisingly well, given the genre, was not making the language cringe. I feel like the books I love are more likely to lean into the "we are not portraying history, we are viewing an era through a modern lens" and are actively trying for the flavor of the regency, not the experience. Marlowe tries for the experience and does a pretty good job, overall.
And also reading this soon after The Duke Who Didn't does the actual plot no favors.