Good way to remember "middageten" Break it up. "Mid-dag-eten". Middle-day-eat. Same for dinner. "Avond-eten." I'm assuming "Avon" means late and "eten" means eat.

Duo is not giving spelling corrections, which means I am getting no indication when I misspell if I am close enough.

Avondeten pronunciation seems wrong

Depending on where in tje uk you are, the evening meal can be called dinner, tea or supper.