Obviously language can be translated, even someone who can't speak can use sign or give written consent. I suppose language itself isn't even necessary, we evolved with the same social instincts that let us understand human body language and tone of voice and facial expression, we can figure out how to communicate across the barriers between us.
That's why the only milk you should be drinking should come from a human who can meaningfully consent.
Goats can not meaningfully consent. I don't care someone trained a goat to jump on a platform and accept milking, it absolutely wasn't the goat's idea. They had to learn to do this from the human that exploits them, and they think it's normal because it's the way things have always been. A wild goat would never let you touch her.
Besides, it's not necessary anyway. No one needs to do this anymore. Just stop.
