Answer:
Walk on the living, they donโt even mumble, Walk on the dead, they mutter and grumble. What are they?
To cross the water I'm the way, for water I'm above. I touch it not and, truth to say, I neither swim nor move.
Come up and let us go. Go down and here we stay.
What can answer in any language? What can speak without a mouth? What can sing without an ear?
At first, I am nothing. Add something to negate. Add again to oppose. Add again to find the time to draw. Add once more to find nobody at all.
What language does a billboard speak?