The Python script I posted is expected to handle single byte errors from UTF8 decoding. Asian languages can be 2 byte for ANSI and so the script may need to get the following byte too to decode both bytes properly.
Probably will not find recovery tools and the like that will fix mixed encoding errors as the solution in some cases might be worse then the problem though in this case tested OK. Once saved, then there might be no going back and so creating a backup before the operation would be wise. Inspect the results to confirm is OK.
