In the Countries topic of the Dutch course there is an image/translation pairing which could prove confusing.
The picture of the geographic area shows some of the British Isles (Great Britain, Ireland and, for some reason, the Western Isles but not Isle of Man, Shetland, Orkney, etc).
The picture of the flag is the flag of the United Kingdom of Great Britain and Northern Ireland - basically much of the same territory as in the map but excluding the southern half of the island of Ireland.
The translation is “Great Britain”. Great Britain is the largest island in the British Isles and contains mainland Scotland, England and Wales so does not match either the map or the flag.
Please could you change the translation to “United Kingdom” - Verenigd Koninkrijk (Great Britain is an island, not a country so doesn’t belong in this topic) and preferably remove the bottom half of Ireland from the picture, which is its own country (in Dutch: Ierland).
Edit: having now started the “More Countries” topic, Ireland is also incorrect. The map includes Northern Ireland, which is not part of the country of Ireland.