When Lincoln is seen as a baby, his tooth switches from chipped to normal.
On the overhead view of the map of Europe, Belgium is separated from Luxembourg. However, the close-up view of the map shows Luxembourg connected to Belgium.
When Morag returned to the castle and sees Lincoln video chatting with Clyde, she is soaking wet and has mascara running down her eyes. When she starts to sing, she is dry and the mascara disappears.
As Lincoln is singing and he walks by Flip's Food & Fuel, he is walking on the sidewalk. In the next shot, when a flyer is blown into his face, he is off the sidewalk.
During Luna's interaction with Morag, she is holding her bagpipes under her left arm. When Morag reveals a painting of the sisters' ancestors showing their talents, the camera angle changes, and Luna is holding the bagpipes under her right arm.
During Lincoln's slideshow, in the image of the the sisters finding all the things they like in Scotland, Lori's hands are unaligned with her wrists.
When the Loud children row back to Loch Loud, Lynn's arms are layered behind the boat, and Luna's oar is inside the boat.
When the Louds' ancestors' ship rocks after being fanned backwards by Lolo the dragon, Lana's ancestor's hat and hair are bright red and yellow, respectively, when their colors should be affected by the sepia effect covering the rest of the shot.
Luan's ancestor is depicted wearing braces, despite the fact that they were not invented until 1819.
During the prologue, two of Lincoln's classmates, Renee and Mollie, can be seen walking down the sidewalk. Since the prologue takes place when the parents first met, they should not have been born yet.
On the map of Europe, Estonia and Russia are not separated, despite them being labeled separately.
On the map of Europe, the island of Great Britain is yellow, but Northern Ireland, which is part of the United Kingdom, is green.
On the map of Europe, Spain is green, but the Balearic Islands, which are part of Spain, are purple.
On the map of Europe, Corsica (France) and Sardinia (Italy) are both yellow, but the two countries that own these islands are light yellow and red, respectively.
On the map of Europe, Zealand (Denmark) is the same color as Sweden.
After the family arrived in Scotland, Lori tries video chatting with Bobby, but the video chat ends up glitching due to a poor long-distance connection. Later, Lincoln has no problem video chatting with Clyde.
In the 3rd season of The Loud House TV series, Lori got accepted into Fairway University. In this movie, Lincoln convinced his family to stay in Scotland. When that happened, Lori didn't remind him that she was going to Fairway University soon.
In the 5th season of The Loud House TV series, Leni had a crush on a boy who had a cowlick. But in this movie, which takes place before the 5th season, she fell in love with a boy named Scott. Because of this, it's possible that Leni and Scott broke up when she started to have a crush on the cowlick boy. However, it's unknown if it's true or not.
It's unknown if Ronnie Anne told her family that Bobby went to Scotland to win Lori back.