Really? In my experience it's pretty rare for Linux programs not to understand any multibyte utf-8 (which would be anything that isn't ascii). What is somewhat

Really? In my experience it's pretty rare for Linux programs not to understand any multibyte utf-8 (which would be anything that isn't ascii). What is somewhat common is failing on code points outside the basic multilingual plane (codepoints that don't fit in 16 bits).