You're wrong. https://www.dol.gov/agencies/oasam/centers-offices/civil-rights-center/internal/policies/english-only-rules#:~:text=EEOC%20Regulation%2029%20C.F.

You're wrong. https://www.dol.gov/agencies/oasam/centers-offices/civil-rights-center/internal/policies/english-only-rules#:~:text=EEOC%20Regulation%2029%20C.F.R.,presumed%20to%20violate%20Title%20VII https://www.dol.gov/agencies/oasam/centers-offices/civil-rig.... You cannot prevent 2 people having a personal conversation in a different language from English. But for the purposes of the business, it is fine to require English, otherwise how do you collaborate? Now let's imagine a watercooler chat. 2 colleagues talking in whatever language, and a 3rd one walks up, gets a drink and now is by default excluded. Legally it's all good, but in my opinion, that 3rd person will feel left out.