He was a very smart kid - voracious reader - and no one ever bothered to correct his mispronunciations. And really, how often is a word like "acrostic" (which he used to pronounce "ack-roe-stick") going to come up in conversation with a fourth grader?
So I correct him. I'm good like that.
I think he's really grateful that I don't let him leave the house sounding like an idiot.
Sometimes, though, there's a perfectly ordinary every day word that he pronounces oddly. On these occasions, he sometimes doesn't believe me that he's saying anything funny and we get into a "chow-DA" versus "chow-DAIR" type of debate. Then I just sit back and wait for outsider confirmation.
Kee: Daddy, can you make my breakfast? Is it time to get up? Is it Friday?
Husband: Yes, I can make your breakfast. Yes it's time to get up. No, it's not Friday, it's Tuesday.
Kee: It's NOT Cheese day! I don't like CHEESE. If it's CHEESE day I have to eat CHEESE!
Although, to be fair, he doesn't say "CHEESE day", he says "CHOOSE day."