Which fruit is traditionally used to make marmalade?

Orange is a fruit is made of Orange juice.

Marmalade=Jam; German.

Misterjoseira71, I love quince apples.

Misterjoseira71, the person that made the explanation clearly does not know where the word comes from and that oranges, and later other citrus fruits, were only used after a ship with oranges shipwrecked at the place in Scotland where they made marmalade.

I would disagree I am from Portugal and Quince is a hard, aromatic fruit, typically pear-shaped and golden yellow when ripe. While not typically eaten raw due to its tartness and hardness, quince is prized for its ability to impart a delicious fragrance and flavor when cooked. It's commonly used to make marmalade,jams, jellies, preserves, and desserts. As in Portuguese call quince ‘marmelo’

Epic Firehaven wubox

In russian language we call marmalade mermelad

{H3LLO_K3TTY}, it’s not the orange it’s the peel that’s sour/bitter. A taste some people really like.

{H3LLO_K3TTY}, Seville oranges have a sharp, slightly bitter flavour and they are usually used to make preserves such as marmalade. When the oranges are ready to pick men go around Seville climbing ladders to reach them.

Jamie sour oranges doesn't exist 💀

I thought it was the sour oranges