[masraum]

Originally Posted by Tidybuoy

I think you need to correct the 4-year-old or the 10–12-year-old's won't know any better.

I don't think that's the case. Maybe if they're still at it when they're 6 or 7. But most kids seem to mispronounce a bunch of stuff when they are first learning to speak, I suspect, because they are learning. I think most kids as they get better, hear what folks around them are saying and mimic what they hear. So as long as your pronunciation is correct and they converse with you or others that correctly pronounce, I think most kids self correct. It probably varies some person to person. Some folks are better/more naturally mimic based on hearing than others.