I’m not talking about those who English is a second language but words or phrases which are said by an OP, which may not be 100% clear, but by taking in the entire post, it’s clear what the OP means.
Some posters have to reply saying “xxx. What does xxx mean? I don’t understand”
When it’s cleared up, they have to return to say “oh. I only know it by it’s proper name yyy. I can’t bear people saying xxx”