If language is only an instrument to designate objects, there could be no possible discourse about God. Speaking about God is, by necessity, a polysemic discourse. It cannot be limited to a strictly analogical discourse. It cannot have a primum analogatum since there cannot be a meta-culture out of which discourse is constituted. That would already be a culture.
Pluralism is inherent, at the very least, in the human condition.
The recognition of God always proceeds in tandem with the experience of human contingency and our own contingency in the knowledge of God. The Christian catechism sums this up by saying God is infinite and immense. It is a discourse that inevitably completes itself again in a new silence. A completely transcendent God would deny divine immanence at the same time that it would destroy human transcendence. The divine mystery is ineffable and no discourse can describe it.