abirdcall
(she/her)
That isn't reflective of what the INT score means; as problematic in aspects as it is, INT is more so treated as objective of a character's abilities. All of your other examples are fine, but this one wouldn't be covered by INT.
I'm not saying that it should be covered by Int.
Int covers the ability to memorize facts.
All that other stuff is also not covered by Int either.
The point is that if a player wants to play a 'stupid' character here are other ways to do it that may accomplish what they're looking for, depending on what it is they're actually looking to do. The point is that people aren't stupid.
If they want to be perceived as being stupid then playing a foreigner might be a way to do so.