Let me give a "for example"
I spoke Spanish pretty fluently as a kid, then I started public school. Now, my Spanish is limited to:
abogado - lawyer
baño - :toilet:
ayuadame - :sos_button:
dinero - :dollar_banknote:
taco - :taco:
margarita - :tropical_drink:
cerveza - :beer_mug:
And Spanish is far from a dead language. If I listen to people speaking Spanish now, I can follow about 1/3 of the conversation, depending on how quickly they are speaking.
I'm with Professor, - if she's near someone who is speaking it, she might be able to follow part of a conversation but she's not going to be able to carry on an entire conversation in it.
Voted no.