Look at how other cultures solved this issue. Arabic has a dialect known today as Standard Arabic. It's what official documents, books, news, documentaries, etc

Look at how other cultures solved this issue. Arabic has a dialect known today as Standard Arabic. It's what official documents, books, news, documentaries, etc. are written or spoken in. Arabic speakers in general are able to understand, but in case their dialects are significantly different, they can always switch to Standard Arabic to get the point across. Also, some people do pick up the local dialect in the country they're living or working in and attempt to speak it, it's not seen as somehow an inferior move or putting oneself down, on the contrary, it's showing a form of flattery.