New Clues & "Baby Talk"

[cheneytardio]

No: HPFGUIDX 86421

I don't think the connection between Harry and Bellatrix is that 
strong, as Fred & George utilize baby talk while making fun of Ron 
for getting the Prefect position.  Granted, they are mimicking Mrs. 
Weasley, but is it fair to make connections between characters who 
use the same type of such general words?
Bellatrix's use of baby talk is notable, however- what does it 
imply?  That she's immature enough to talk like a school-aged boy?