A dc in my extended family has been slow to learn to talk and now at 4.5 I would say is only about max 50% intelligible to non-close family, if you concentrate. All his speech is still very indistinct. I have children of a similar age so am used to tuning in to small dc.
Apparently their nursery say he's fine...but he doesn't seem fine to me. His parents talk/read to him all the time but they don't seem to have sought specialised advice. Worth saying something?