Continuity mistake: When Niles is putting the flowers in the vase, there are 3 sitting on the table, he goes over to the door and when he comes back they are now facing a different direction. Niles then puts two of the flowers in the vase, he picks up the third one but puts it back on the table. The next time we see the table the flower has disappeared then reappears in the next shot.
Continuity mistake: In the opening scene Fran puts a pad of paper and a pencil on the counter. The pencil is vertical, the next shot the pencil is horizontal, the last time it is seen it is vertical again.
Answer: Children's brains and language skills are still developing at that age and they adapt to the environment they live in. My former boss was born in England and moved to the US at about eight years old. She completely lost her British accent by her teens, even though her parents still spoke as typical English citizens. A Japanese co-worker and his wife, also Japanese, spoke English as their second language. Their two children learned both English and Japanese simultaneously while growing up and spoke each language with the appropriate accent.
raywest ★