I was talking with Salahzar Stenvaag, one of the most active avatar in the Italian community and a wonderful and generous scripter and teacher. He was telling me of his new Blackboard for the Portuguese language (you can get your copy here https://www.xstreetsl.com/modules.php?name=Marketplace&file=item&ItemID=1502539 for 0 Lindens), and we were talking about the problem with different languages in SL.
If you teach a language that has characters or signs that are not present in English, you probably already faced the problem: accents and some characters (ñ, ç to make just two examples) are not available, and… well, people coming to your classes or activities are interested (and have the right) to see the correct spelling words. I guess that the problem for language that do not use the Latin alphabet is even more serious.
If you enjoy some “do it yourself” activity in SL, Salahzar you can try to make your own board following the instructions here http://wiki.secondlife.com/wiki/XyText-UTF8 and the supported characters here http://www.fileformat.info/info/unicode/block/index.htm.
And now a good news for Italian teachers and students: soon, very soon we will have the Italian version of the viewer!!!