Continuity mistake: The pickup truck with the painting of the Gypsy woman and the unicorn in Chapter 6 changes into a VW microbus in Chapter 18.
Factual error: Being Swedish I found this quite comic. When the Gypsies speak Romani it is not Romani at all, but sentences in Swedish which make no sense at all within the context.
Jason and the Argonauts
10 biggest mistakes of 2017
A new menu and more - thoughts welcome...
25 biggest mistakes in classic Disney movies
First pictures of Josh Brolin as Cable for Deadpool 2
The biggest mistakes in Spider-Man: Homecoming