Can't input non ascii characters

[sledgehammer999]

Checklist

• [X] I have read through the manual page (man fzf)
• [X] I have searched through the existing issues
• [X] 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
• [X] Windows
• [ ] Etc.

Shell

• [X] 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.