My DS is 31 months and says about 80 words but a lot of them are mispronounced.
He initially saw SALT at 2 years and she did an initial assessment on him (at that point he wasn't really saying any words) and we haven't seen her since! His nursery has since pushed things forward because he doesn't really say a lot there, we saw the HV last week and she completed an assessment on him which scored him on all areas including verbal communication. I believe DS thinks he is talking to the required level, he isn't frustrated at all by it.
Her advice was to carry on doing the things we're already doing and to try and chill out about it. She said good understanding is a good indicator at this stage and chances are he will catch up but she has pushed for SALT to see him again ASAP.
Things we have been doing (some recommended by SALT) are to keep language quite simple, not over complicate things - hard because he does understand things.
Keep pushing his vocabulary, so progress on from "Where's Peppa?" to "What's Peppa doing? That's right (even if they just make a sound) she's running. Peppa's running!" or "What's that?" and try and get them to respond.
Repeat, repeat, repeat....if DS says "Bus" I say "that's right, a bus, well done! It's a blue bus. It's going fast. The bus." Exhausting at times...
If they mispronounce, don't correct just repeat correctly.
Minimal TV time.
Get on the floor and play with them. I'm sure everyone does this but I find it really helps his concentration and interaction if I'm on his level.
Lots of stories and books.
Point everything out, all the time. Constantly...hard I know!
Good luck everyone, it's incredibly hard when all the other children are talking and yours aren't. I suppose they all must talk at some point!