Nam Retupad is discussing:

The fatal police shooting in Salinas of a Zapotec man who was holding a BB gun has Indigenous advocacy groups concerned that language barriers were a factor in the encounter.

No problem with a language barrier. America is an English-speaking country. Every immigrant who comes to America - legally or illegally - knows this. If they don't believe they can get along in an English-speaking country, go to a country that speaks your native language.

If I CHOOSE to move to Japan, I know I've got some learning to do - both of language and customs. I, being a reasonable person, would probably try to do most of that learning BEFORE I go to Japan.