My ds is 23 months and has three 'proper' words - duck, fish & star - which he says clearly. He has his versions of frog, cat, dog, bee, milk, hot, I want, chicken, cockerel, pig (we don't live on a farm so why all the animal words I don't know). He actually says many more words than my dd did at that age (she's absolutely fine now), but my HV is getting skittish.
His hearing is fine (been checked), he loves books, music & singing, he points, waves & claps, if he wants something he drags us over to it rather than making any attempt to ask (exactly as my dd did), he understands questions/instructions like - Where's Daddy? Can you get your boots? Can you bring me the post? Do you want a bath? We're going for a walk etc.
Should I be freaking out? I have no other concerns about his development.