Neil Cohn of Tufts University takes a deep dive into visual language.
Highlight, from the Q&A session after the talk:
"Art is used in very specific cultural contexts... Language? We use language for everything. Language is used in all sorts of different contexts. Why not use visual language in all sorts of different contexts?"
His talk is 45 minutes so check this out when you have time. In the meantime, Neil's website and blog are worth a look.