how to fix that?

1. Describe your OS (your computer's Operating System: Mac/Windows/Linux/etc. & version).
2. Describe if Inkscape was newly installed, or upgraded from an earlier version.
3. Describe the version of Inkscape and the installer you used (the file you downloaded from the website: .msi/.exe/.zip/other ). 

1. Windows 10 Pro 21h2
2. 1st install, never touched that before
3. inkscape-1.2.2_2022-12-09_732a01da63-x64.msi

Have you tried resetting the preferences and restarting Inkscape? https://inkscape.org/forums/questions/getting-back-to-square-one-and-starting-over-its-easy/

There are a few reports related to UI and fonts: https://gitlab.com/groups/inkscape/-/issues/?search=ui%20font&sort=created_date&state=opened&first_page_size=50

This seems close... a bit of chatter about language packs... are the host  machine and Inkscape language set the same?  https://gitlab.com/inkscape/inkscape/-/issues/1502