if you are interested in the topics of this article i encourage you to read https://www.potreroview.net/starr-king-one-campus-two-school... about a Mandarin immersion program in San Francisco. the issues are very complex.
Of course, people with motivations not entirely driven by teaching children reading, writing, and arithmetic can make things very confusing.
Maybe we can include it as an elective in highschool?