It's just an example, but this comment: > Then there are cases where it’s not even clear whether something represents a language. An example is the quipus of P

It's just an example, but this comment: > Then there are cases where it’s not even clear whether something represents a language. An example is the quipus of Peru—that presumably recorded “data” of some kind, but that might or might not have recorded something we’d usually call a language is slightly out of date: As of December, at least some khipus have been shown to exactly match with Spanish census documents! https://www.atlasobscura.com/articles/khipus-inca-empire-harvard-university-colonialism https://www.atlasobscura.com/articles/khipus-inca-empire-har...