Checklist

• I have read through the manual page (man fzf)
• I have searched through the existing issues
• For bug reports, I have checked if the bug is reproducible in the latest version of fzf

Output of fzf --version

0.52.1 (6432f00)

OS

• Linux
• macOS
• Windows
• Etc.

Shell

• bash
• zsh
• fish

Problem / Steps to reproduce

Specifically I use bash from git for windows.
OS: Win 10
Terminal:

1. Windows Terminal (1.20.11271.0)
2. mintty 3.7.0 (shipped with git for windows)

When I hit CTRL+T and try to input greek characters they appear in the prompt either transliterated to their equivalent ascii (eg α becomes a) or printed as the ? character.
This happens with both terminals.

Both terminals are able to print greek characters (eg ls a folder with greek filenames) and are able to take greek input in their prompts. So the issue is with fzf's prompt.