no idea when there supposed to talk properly, but I think they can start understanding you from about 6-7 months, they are talking in there own way we just dont get it lol.
Oran says hiiii yaaaaaa all the time when someone comes, or like if I pick him up from Nannas etc but then I say it back ''hi ya'' and he saying it for about an hour so dont think he gets the context lol. He does say Dadda quite a lot and he says mamma but not loads. If yuo ask him where is mummy, daddy, grandma or grandad, kallie or Jack (his cousins) he will look at them / for them. If you say whos here, he gets excited and looks at the door waiting to see who comes in.
If I ask him for a cuddle he crawls over and puts his head on me for a second or if I say ''give xxx a cuddle'' he will, If I say wave bye bye or hello he will, or go bang he banks the floow or wall and shouts booon booon (?!) If I say do you want some juice he crawls the the kitchen and points to the fridge and if I say ''is it time for num nums'' he claps and waits by his high chair, oh yeah and if I should and say no (when he is biting hitting) he cries and tries to cuddle me bless him so he deffo knows whats what, they just cant comunicate!!
He is constantly shouting, chatting, screaming etc it must be so frustraiting for them.