Curious... my DS is very nearly 12months old.
He babbles a lot but all very meaningless. He will say mama, dada, baba, brabra, da", ca", etc. We thought he'd nailed 'cat' - we have one who he loves - but then he used this for 'clap', and literally everything else. Now he's gone off it and is currently just yelling.
Friends the same age have children with contextual, deliberate words.
We talk to him a lot and occasionally he will mimic a 'heroo' (ie hello) or 'row row' as in row row your boat - but then it's gone.
When did your DCs get their first words?