There’s a difference between bringing language ‘down to earth’ and pulling it into the earth to bury it.
Nihilists want to bury it in allegory and romanticism, and idealism, (positive nihilists) or they want to convert it to meaninglessness and declare philosophy dead (pure nihilists).
If the world lacks absolute, create them with semiotics; if these fail to convince or to produce the desirable outcome, then settle for absolute negation as the one and only certainty.