Comment by psychoslave

I don’t think this is a hard limit. It’s also a matter of interest and opportunity to meet people, consolidate relationship through common endeavor, and so greatly influenced by the social super-structure and how they push individual to interact with each other.

To take a different cognitive domain, think about color. Wikitionary gives around 300 of them for English[1]. I doubt many English speakers would be able to use all of them with relevant accuracy. And obviously even RGB encoding allows to express far more nuances. And obviously most people can fathom far more nuances than what could verbalize.

[1] https://en.wiktionary.org/wiki/Appendix:Colors