Describe the bug/issue

The default theme for the Ukrainian UI (as well as other languages with Cyrillic text) contains text with too wide letters and with large spacing between letters, which looks monospaced.

The problem does not appear only in the "darktable" and "darktable-icons" themes.

To Reproduce

1. Launch current Windows darktable build and change the interface language to Ukrainian.
2. Restart darktable. If you do this with an empty configuration directory, then you will get the theme "darktable-elegant-grey" and you can observe the problem.

Platform

• darktable version: Latest git master build as of the date of the issue.
• OS: Windows

Additional context

This is not reproducible on Linux (at least on a regular Ubuntu installation).