I've been thinking about this as well, especially in the context of historical precedents in terms of civilization/globalization/industrialization.

How LLMs standardize communication is the same way there was a standardization in empires expanding (cultural), book printing (language), the industrial revolution (power loom, factories, assembly procedures, etc).

In that process interesting but not as "scale-able" (or simply not used by the people in power) culture, dialects, languages, craftsmanship, ideas were often lost - and replaced by easier to produce, but often lesser quality products - through the power of "affordable economics" - not active conflict.

We already have the English 'business concise, buzzwordheavy language' formal messaging trained into chatGPT (or for informal the casual overexcited American), which I'm afraid might take hold of global communication the same way with advanced LLM usage.