Which commenters, where?
Read some of the links posted by Stob...
Of course the "two language" was a provocation. But in my experience, invariably when in a forum I see people complaining about a language adopting Unicode they are native anglophones - and living in an anglophone country - which means they mostly don't encounter foreign languages.
Anyway, there's a big difference about hearing or even speaking more than one language, and actually having to process text. There are many idiosyncrasies in how text in different languages is written and manipulated that are of course lost when speaking.