Bust nuts to plant seeds
Stroke wood to save forests
Polish pearls to clean oceans
Buff the beaver to make rivers cleaner
Jack and Jill to save a hill
Masturbate for your planet's fate.
I wouldn't rule it out, the game gets a lot of money and even if it's not a short term priority it wouldn't be hard to hire some voice actor once more sound work gets done.
I said 'unlikely', not 'impossible', meaning that there is little chance, not that there is no chance.
P.S.: The new 0.721 alpha version has incorporated female moaning sounds. Check it out on Helmsman's Pat reon.