If you have better method I would be interested to know, this was my workaround.
Need to backup/restore/find files with Korean and Chinese characters while in an English environment.
Windows CMD and PowerShell seem to be incapable of producing Korean and Chinese characters, they produce a nondescript symbol as a substitute. Found the command chcp 65001 to change unicode to UTF-8 was ineffective. Same with chcp 1200 (UTF-16).
Found a couple of PowerShell terminal utilities that would display files in their original languages, they had the same issue of not being able to run as admin (underlying libraries cannot run as admin). Both Windows Terminal and Fluent Terminal seemed to work as advertised, there are probably others like these that work just as well.
Best to run Terminal Server as administrator (when pinned to the task bar admin option not available)
Fluent Terminal can’t run as administrator using RunAs opened a native CMD or Powershell window and you have the same problem of working with rubbish symbols. Sudo from the creator of scoop, Luke Sampson, solved that problem. Terminal Server is able run as administrator but not pinned to task bar.
Now restic can display and work with files backed up with names in Hangul and Chinese characters.
What didn’t work:
In my test file there was as a ’ character in the file name that killed any attempt of a restore. The file name had to be truncated to avoid that character. That occurred in both the original file name and English equivalent. Not sure if a PowerShell or restic (golang) parsing problem.