Bryzoan I think 2 year olds integrating is a problem to be solved across the board. J's nursery is mainstream, and, well I don't know about all of them but I know his bffs at least recognise most signs. Because it's normal to sign.
I was building J up to his second visit this week by telling him he was going to go there and play with cars, then sing songs, then play in the sandpit, at which point he stopped me and frantically signed that he was going to play with cars, sing songs, read stories then play in the sandpit. Which is what he did last week, tbf.
J is 3 in September, so I think you're a little bit ahead of us, but R sounds awesome. Q. Do you get "helpful" family / friends / acquaintances / strangers doing the least helpful things offering unasked for advice?