Elisa's syntax, diction, and conversation skill suffered as a result of the impoverished, unfit environment she grew up in. This contrasts the innateness theory.
(As opposed to innateness(Chom)
"Me! I never brought her up at all, except to give her a lick of a strap now and again. Don’t put it on me, Governor."
"Will you take advantage of a man’s nature to do him out of the price of his own daughter what he’s brought up and fed and clothed by the sweat of his brow until she’s growed big enough to be interesting to you two gentlemen? Is five pounds unreasonable? I put it to you; and I leave it to you"
"He’d as soon you set a bull-dog on him as a clergyman. You won’t see him again in 41 Shaw a hurry."