what's your take on employers banning the use of languages other than English between coworkers at the workplace?

https://linux.community/post/3497785

Racist, and a way for management to know if workers are discussing unionization.
Not always, it’s also a politeness thing, it depends on context
Preserving “politeness” is the same tactic they use to keep workers from discussing their pay with each other, which is also deeply anti-labor.
Sure, I won’t disagree that it’s anti labour, but being polite to and around your co workers is important