I did some research but didn't find an answer to it.
The asterisk seems to be a common symbol on the web for marking input or user interaction as required. Most likely it has it's origins in print where the asterisk is common to refer to a footnote and this pattern is transferred to the web as the explanation text like '* = required' is very often at the end of a form.
My question is: Is the asterisk (*) the common symbol for all languages on the web? If not, in which languages is it different?