i did clone and build jigasi from master branch. in transcription, it writes unicode characters like this: (in both text and json files)
<10:02:51 AM> a: ??? ??? ??? ???
when i am installing jigasi nightly version with apt (i think it is version 1.1-177) it works fine
If its only the saved text file, I guess this is a bug and is not using UTF-8 to save the transcriptions in the text file …
It can be the problem the FileWriter in the code that is picking something different from the OS, I see you can do -Dfile.encoding=UTF-8 so you may try adding that in /etc/jitsi/jigasi/config and see whether it fixes it for you