You made this statement which is wrong:

> ~47 million Americans aren’t native English speakers having immigrated from a non English speaking country.

Your link says 46M total which includes native speakers. So it does not state how many non-native speakers. (not that it would matter as most would be proficient english speakers, just pointing out you're exagerating and your numbers are wrong)

Link is showing slightly outdated data as is common on Wikipedia, but the breakdown by country is what’s important.

“About 47.8 million immigrants in 2023” https://usafacts.org/answers/how-many-immigrants-are-in-the-...

My family immigrated. We’re native English speakers from India.

So immigration had zero impact on your family being a native English speaker. And again 47 < 47.8

[flagged]

The question of your native language is answered long before any of what you’re talking about here. A 20 year old isn’t time traveling to have different parents when they take an exam.