Personal lingo barrier

Personal lingo barrier, (i made this term), means a personal language barrier, where kne person defines how they see certain words and use them in their head differently than others, this may be a result of using a word in slang to the point it loses its original meaning, viewing certain phrases in a different light, or just being misguided as to what a word actually means, either due to being explained it wrongly, remembering wrongly, or any form of miscommunication

(person one): i was thinking we could go to the museum!
(person two): that would be very silly
(person one) oh, sorry :(
(person two) whats wrong?
(person one) nothing, i just wanted to go to the museum,,
(person two) so why not?
(person one) i thought you said it was silly?
(person two) well, to me, silly is good, like fun, or likeable, a positive thing!
(person one) Oh! so it was a Personal lingo barrier! good to know
(person two) so how about that museum?