well I am a little voice in opposition
but never mind - no one has yet distinguished language acquisition and speech acquisition
and I cant work out which for this child
Rooze - the child had clearly acquired language and was communicating but not by speech
so.....
if the mother is worried rather than you:
https://www.nhs.uk/conditions/pregnancy-and-baby/helping-your-childs-speech/#think-your-child-may-have-a-speech-or-language-problem
she can refer herself no less to a speech therapist
or go thro the GP - and then onto a paed who specialised in child-development. There are CDCs all over the place now ( child development centres)
am I medicalising slowness to talk ? No I dont think I am
oh and your child isnt an Einstein,, so lets not take lessons from that example ....