It's worth mentioning that Italians also exhibit diglossia as well not only the Chinese. They speak in dialect at home or with friends and family within the com

It's worth mentioning that Italians also exhibit diglossia as well not only the Chinese. They speak in dialect at home or with friends and family within the community but in the official Italian in public. We Arabic speakers also enjoy or suffer , it depends on your perspective, from this phenomenon as we mostly speak in dialect all the time but in formal contexts esp. in writing, we use the Modern Standard Arabic instead. However, writing in dialect or MSA derived languages is becoming more acceptable in literature and the press at least where I come from, that's Egypt.