The language this house builds its sovereign local tools in. A named language rather than a concept.
Old English rust (corrosion on metal), from a Proto-Germanic root related to the colour red; the programming language borrowed the old word directly, reportedly for a fungus's resilience rather than for decay.
The language this house builds its sovereign, local-first tools in — named, by its own makers' account, for a fungus's resilience rather than for corrosion.