abirdcall
(she/her)
First off, I completely agree with your basic premise. However, as I pointed out in my initial post here (and others have pointed out as well), you went about this a bad way. Because Intelligence, the D&D score, isn't about how people perceive you; it's about your actual abilities. So if you're playing a person with Int 7, but you decide to play this person as being from a very different country and having problems adapting, you're saying "foreigner = stupid." Especially since your Int doesn't become higher if you were to travel back to your country, since that's not how D&D works. Same thing for any of the other ideas you posted there; none of them are really tied to Intelligence, the D&D stat--or any other D&D stat. At most, they're Personality Traits (to go along with Bonds, Ideals, and Flaws). "I am new to this country and I'm not adapting well."
Intelligence in D&D is about your ability to memorize facts and a character with an 8 Int has a marginally worse ability to do so.
No, this has nothing to do with stats when someone wants to play a 'stupid' character.
I'm not saying "foreigner = stupid" I'm staying no one = stupid.
I'm not providing alternate ways to play stupid characters because people shouldn't play stupid characters.