My son is about to turn 16 months. He's not yet walking independently (suspected hypermobility), but has made leaps and bounds in this respect, and is probably on the verge of it.
But his language hasn't really got any better for a while. His words are:
teddy
Doggie
Thank you (sometimes)
Baa baa (for sheep)
Night-night (sometimes)
Bye bye (sometimes)
mama and dada (but not always in context)
And he'll also join in with e-i-e-i-o chorus of Old Macdonald and know when to say baa-here, baa-there etc
But this hasn't changed in a while. And as you can see, not always consistent.
I suspect his energies have gone on walking. But is this a small amount of words for his age?
He seems to copy a lot of sounds and be interested in them, and jargons often, but that's it...