I speak Spanish very well, and I'm pretty conversational in both Swahili and Cambodian. Extremely helpful in my area of Minneapolis. Especially working with first-generation immigrants.
It certainly is necessary to be able to communicate in these modern times but businesses, wanting to sell their shit, have adjusted faster than those learning the language. It's also extremely easy to not speak English in big cities. Cultural groups all have their own area of town. Little Mexico, Frogtown(Hmong neighborhood), etc. I can not order food in Frogtown because there is no need for the businesses to have English-speakers in a 90% Hmong neighborhood.
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