@hongminhee Wow! I could not imagine that it is _that_ bad!.
In the comments of thread `lang` attribute necessary and useful not only in context of East Asian languages, but in cases like Polish word on English wiki page, or German within English or wice versa. So aspect the lang attr addesses present for any region or language, not for East Asian.
Never thought that there are so culturally-blind people in IT sphere. May be this is because i working in a distributed and diverse team for years.