When did Juan Pablo de Bonet invent sign language?

Juan Pablo de Bonet did not invent sign language. While his book, "The Art of Teaching Deaf-Mutes to Speak" (published in 1620) is considered one of the first known publications on teaching sign language, it is crucial to understand that sign language existed long before his time.

Sign language is not an invention but rather a naturally occurring language. Deaf communities around the world have developed their own sign languages over centuries, with each language reflecting the unique cultural and linguistic influences of its community.

Bonet's work was important for a few reasons:

* It was one of the first documented attempts to systematize and teach sign language.

* It helped to promote the idea that deaf individuals could learn and communicate effectively.

* It introduced the concept of using sign language as a tool for education and integration.

However, it's vital to recognize that Bonet's work was based on pre-existing sign languages used by deaf communities at the time.