My DH does the pedantic correcting, which is a huge problem now that I’m perimenopausal and occasionally losing words.
I was gardening the other day and asked him where he’d put the ‘little shovel’, because I the word ‘trowel’ wasn’t coming to mind. He had no idea what object I was referring to. I explained what I was trying to use it for, I described it as a handheld tool for digging little holes in the garden. He still didn’t understand what I was after.
I eventually found it, and DH said, quite angrily, ‘that’s not a shovel!’
I said I knew it wasn’t a shovel, that was just the closest word I could come up with at the moment.
He followed me around the garden explaining that a trowel is NOTHING LIKE a shovel, a shovel has a flat edge and is used to move material like dirt or gravel, and is completely unsuitable for digging.
Our DC is like this to an extreme extent - if he feels someone has pronounced a word wrong or put the accent on the wrong syllable, or even if they have a cold that affects the way they make an ‘n’ or ‘m’ noise, he can’t let it go, and keeps asking ‘why did you say it like that?’ over and over and over.
It’s a combination of OCD and genuine struggle with language processing.
I don’t think it’s a behaviour that can be changed, TBH. Doesn’t make it any easier to live with.