You said they don’t have exposure. Exposure is everywhere in the US. I’d argue that Americans are exposed to far more Spanish than the average Italian is exposed to German. I suspect you’d find few Americans who don’t know what Agua means and would be confused if someone said Adios to them.

Most US citizen, never interact with people who don’t speak English as most Americans never leave the US.

Well, except for the 68 million people inside of the US that speak another language. If you live in New York city, California, Texas, or Florida, it’s damn near impossible not to be exposed to languages other than English. And statistically most of us do live in one of those places.

It’s changing, but not because of the education system. 22% of Americans speak a language other than English at home, and many, many more are likely bilingual enough to speak to immigrant relatives.

It’s hard to find numbers on third generation immigrants, but anecdotally seems very common for grandchildren to be able to speak to a non-english speaking grandparent. Almost 1 in 3 are either an immigrant themselves or are a child of an immigrant parent, so it stands to reason that the number having at least one grandparent to speak a language other than English is significantly higher, perhaps 40-50%.

https://www.census.gov/library/stories/2022/12/languages-we-speak-in-united-states.html

They will still ask him to invert a binary tree, just to be sure he can code

Here’s a crazy idea. What if down voting a comment/post resulted in a weighted random float between 0-1 while upvoting resulted in a weighted random float between 1-2? If you virulently hate a comment or post, ignoring it is the surest way to bury in completely. Posts and comments that Garner attention become the most visible, but gaming the system for visibility could become difficult if the weighting algorithm was tuned appropriately.