I have a multilingual survey, 5 languages (German, French, English, Italian, Korean).
Everything works well at the survey level to display Korean characters, but we are unable to create email invitations (with Opinio 6.1 Enterprise) using Korean characters: everything arrives by email with ??? characters instead.
I tried both the text/plain and text/html options, to no avail.
It seems that not only are invitations impossible to format in Korean, but when respondents answer, answers are not captured correctly in the database. Everything ends up as ???? everywhere in the database.
The only thing that works, and not even from all computers, is the survey itself: on some machines it is being displayed correctly with Korean characters, and on some others the survey is not legible, all characters showing as squares.