Factual error: None of the Swedish wedding traditions Ingrid mention actually existed in the 19th century and the bread she's baked is not traditionally Swedish. When she later speaks in her mother tongue it's definitely not Swedish.
Continuity mistake: When Dorothy is doing laundry, she grabs a large piece of linen from the washtub, as Dr. Mike approaches and they talk about Dorothy hiring a caregiver for Loren, during his stroke. As Dorothy starts cranking the linen through the wringer, she stops to protest to Dr Mike about it but then turns around holding the wrung linen in her hand, though she hadn't finished cranking it out. (00:32:30 - 00:33:20)
Fifi's First Christmas - S4-E12
Continuity mistake: After Fifi has gone after the red scarf, Brian picks it up. In this wide shot, there is nothing on the left of Brian, however in the next close-up shot, there is a horse next to him.
Continuity mistake: When the whole town comes to support Matthew, we can see Hank and the reverend walking up behind him. A few seconds later, we see them both again, now they're walking with Colleen and Brian, and they have just come around the corner to see what all the fuss is about.
Visible crew/equipment: You see an automobile's headlights driving in the background when Hank is giving Dr Mike a hard time after his NaNa is brought to the clinic.
Answer: A Cooper was someone who made various things out of wood including wooden caskets and even barrels.