The built-in .zip archiver in older versions of Windows used DOS (OEM) or Windows (ANSI) code page corresponding to current regional settings for new archives. Lots of such archives still exist. The correct behavior is to determine the relevant OEM or ANSI code page based on the system locale and use it. You can look at this PR for reference implementation: https://github.com/p7zip-project/p7zip/pull/232
Sample archive showing this bug attached. It uses CP866 (often called DOS or OEM) for Cyrillic (Russian) letters.
<<attachment: Desktop.zip>>
