autianarchy I absolutely agree with getting on with things in the meantime, but don't really know where to start.
Like I say, I feel it's his language which is the major issue, so to improve that we are having NHS SALT, going to a Talking Tots group, doing exercises recommended by SALT, watching lots of Mr Tumble. He is at nursery 2 full days per week, and they have him on an IEP & have access to special games & activities from the local council's SENCO (nursery is funded through 2-year funding for speech delay) & I am also giving him Omega-3 vitamin supplement. We went to group SALT just before he turned 2, but they said we couldn't go back as he's receiving individual SALT now.
SALT also recommended encouraging pretend play, so I have brought out his toy kitchen & garage (we have just moved & it got buried under mountains of stuff!), he has a dolly which he loves to play with (imitates me using 6-week old DS3's pram, bouncy chair etc). We have also bought him a Happyland village for his birthday.
We also go to one toddler group and Rhyme Time at the library each week, which I think help him to mix with other DC and learn words/actions through singing & improve his concentration as he has to sit still for the songs. We also have at least 1 playdate most weeks, sometimes with DS1 as well, which again encourages him to mix.
Is there anything I am missing that I could be doing with him? Like I said in my last post, his speech is coming on loads at the moment, he seems to be gaining new words every day, his existing words are clearer and he has started using 2-word phrases ('baby milk' 'Mummy hand' 'hello Daddy' to name but a few) literally in the last fortnight, and I am praising him loads, it makes me so happy to see this progress 