Maddison was talking sentences by her 1st birthday, but that was living with 3 adults whom love a chat... Indah was a bit slower but can count to 10 in English & Indonesian she will be 2 in Sept, she can sing Twinkle Twinkle Little Star & The barney (I love you, you love me) song.
We all talk all the time, so I think that must help, plus when she started pointing to things & grunting we ignored her so she had to say the word of what it was she wanted!
Our friends son whom is 9 days younger points & grunts & is handed everything so he still gets what he wants & therefore there's no need for him to speak IYKWIM?

I dont think there's anything to worry about, but having her assessed isnt a bad thing either!

I think I read they should be able to say 50 words by the time they are 2?