Re: Emacs 27.1 forces a very ugly font for Cyrillic characters and I can't override it.

[Eli Zaretskii]

> From: Nikolay Kudryavtsev <nikolay.kudryavtsev@gmail.com>
> Date: Sat, 13 Mar 2021 15:05:13 +0300
> 
> Being rather operative with the new releases, I've finally decided to 
> upgrade to 27.1 from 26.2. And here's what I ran into:
> 
> In my init I have:
> 
> (add-to-list 'default-frame-alist '(font . "Liberation Mono-10"))
> 
> This forces Liberation Mono font for all frames. Or would do so before 
> 27.1. But now all of the Cyrillic characters get displayed in MS Gothic, 
> which is a very ugly font.

You are on Windows 10, right?

What does the below produce?

  M-: (getenv "LANG") RET

> I've tried to test an assumption that maybe the font-backend is 
> responsible for font selection and now the harfbuzz is the default for 
> me. But forcing uniscribe again didn't help.

No, the fact that we use HarfBuzz now is not related to this, I think.
Font selection is largely independent of the font backend.