"He wants to choose his wallet."
Übersetzung:Er will sein Portemonnaie wählen.
Duo's hints are for the word out of context. It's up to us to know or learn which translation of the word fits a given sentence. After all, they're hints, not an answer sheet. It would be much harder, more expensive, and a lot more computer code to have a different hint for a given word in every sentence. And the result in the long run might actually be less learning. Of course, it's more fun to get the answer right, but you can also learn from getting it wrong. And personally, what I learn from mistakes often sticks with me longer.