Editing in a notification does not notify, [@Mistiel]. Something to remember for the future. I've been betrayed many times by that, haha!

I was just thinking of a simple plug that turned digital data into memories inside the brain. There would be no wifi or other ways to connect to people. The Progenitors would likely control all of the equipment anyway, so you'd only get a download when and if they let you.

I was thinking of something that is less words but more sound. It would be less "I love this person with all my heart!" and more "La la la LA LA LA JAAAAA!" Or something. But it does present its own flaws. You would still need to practice them, as one example. This is true if you go for "sound" songs or "word" songs.

And neither of the above really prevents small groups from making up their own sign language. It wouldn't be terribly complicated, but people would find ways to commute simple ideas like "lets go shopping/have sex/go to the movies." you could give people crippling arthritis, but  they can still trace things with their feet. you would have to be pretty thorough to prevent someone from finding some way to express themselves. I'm not sure what the solution is.