Unfortunately, you've given us NO INFORMATION about your computer.. Operating system? Laptop or desktop? Do you have Japanese or Korean language options enabled? Which program exactly, gives you the error? MS Word? Something else? Which "line" in the "Do you want to save changes to" shows the funky writing? Do you have any folders which "looks like Japanese or Korean writing"? (Generally, the "Save in" line of the Save boxes only go to actual folders which would indicate there is a folder named such.)
Just in case it's malware, have you recently run a full system scan with a good, current antimalware scanner?
Hope this helps and let us know more.
I have been noticing for awhile something funky. For example, if I go to close a window without saving, it asks "Do you want to save changes to" and then looks like Japanese or Korean writing.
It's not a show stopper, just annoying. Any ideas on how to fix it?