According to the foreign language label, the down jacket you bought is filled with down, not feathers.

Duvet is English and refers to other types of down, often not duck or goose down.

Down is English and refers to natural goose down.

piumino is Italian for down.

In addition, waterfowl refers to natural duck down, autres plumes refers to other small feathers, and feather refers to feathers. These are all words specific to fabrics. It can be seen that the filling does not contain feathers, and some down jackets will indicate the percentage of different types of down.