Off the top of my head all I can say about Paraguay is 1) Basically everybody speaks an Indigenous language there 2) Their first leader banned white people from marrying each other 3) The flag has a different design on the front and back, and also the national anthem is pretty neat IMO 4) A huge but unknown percentage of the country’s population died when they were invaded by Argentina, Brazil, and Uruguay in the 19th century; when Rutherford B. Hayes arbitrated a boundary dispute in Paraguay’s favor after the war, the country named one of its administrative divisions after him.

Off the top of my head all I can say about Malawi is 1) formerly known as Nyasaland, the country gets its current name from the Chichewa word for “Flames”, because when the sun rises over Lake Malawi, which dominates the country’s eastern border and has some border weirdness, the waters supposedly look red like flames. 2) Malawi’s flag represents this fact, being essentially a stylized representation of a view of Lake Malawi at sunrise from Malawi’s side of the coast, coupled with pan-African symbolism. 3) Malawi was led by Bingu wa Mutharika from 2004 to 2012, and he changed the flag to have a full sun instead of a rising sun, in order to represent the country’s progress since independence. The flag was changed back to the original rising sun version shortly after Mutharika died of a heart attack.