In the first Prince & Me, King Haarald is sick and dying, and that is why Edvard leaves Wisconsin to return home and become king. In this movie, Haarald appears to be alive and well. Also while walking through the garden with the busts of former kings, on looks a lot like James Fox, who played the character in the first movie.
when Paige offers Kirsten to take her place to dance with Edvard the woman in the back with the red hair appears again when Eddy and Kirsten are dancing and she spins off then trips. then is seen again in the background when Paige brings Kirsten her shawl to cover up after she had ripped her dress, when Kirsten storms off she is behind Kirsten again. then in the background again when Paige and Eddy dance.
While showing us "Danish" castles and buildings, the movie's opening sequence included a shot of a castle flying Czech flags (blue, red, & white). Like the first movie, parts of the sequel were shot in the Czech Republic.
When Paige at a press conference admits that the Danish language is her biggest challenge, king Edvard says - in Danish with a heavy British accent: "Du bli'r hurtigt flydende!" (= you'll get fluid quickly!) He meant 'fluent'. In Danish he might have said: "Du vil hurtigt komme til at tale sproget flydende."
The "loop hole" in the law states that the commoner has to have knowledge about the Danish constitution. This law is from 1282. However the law Paige is reading is from 1953. The earliest constitution is from 1849. However this can be a confusion with the Code of Jutland which is, as stated in the beginning of the movie, from 1241 (but never considered the Constitution of Denmark).
Throughout the movie, Paige is referred to as "Crown Queen", but this is incorrect. She has no title yet, and would then be referred to as "Miss Paige Morgan". There is no such thing as "Crown Queen", and only after marrying the Crown Prince would she be called Queen.
The goof item below may give away important plot points.
When she presents him with the ancient big book, he looks at the opening pages and sees the answer to their problem. But when he uses it in the Church, he opens to a page closer to the middle of the book.