I installed Solus with GNOME today. Everything is great, except strange behavior of fonts. I installed additional fonts and changed all fonts to Cantarell Regular 11, using gnome-tweaks. But changes didn't applied in titlebars. The font remains bold there. Second font issue is in conky. I use Droid Sans in my conky config, but it doesn't load. Output gives error:
conky: can't load Xft font 'Droid Sans:bold:size=10
However, conky starts, but font is very ugly. And there's also problem with locale. I use ru_RU.UTF-8, but conky couldn't display russian symbols until I added LANG=${ru_RU.UTF-8} LC_TIME=${ru.RU.UTF-8} everywhere. This is also strange behavior.
Please, help me to understand the reason of these problems.

    rinaldus Known theming issues lately with certain icon/widget combinations. The threads for this are easy to find. As for myself any theming incompatibilities went away last update (before today's). I wonder if your clashing fonts are directly/indirectly related to this?
    Cantarell and droid both in repo/open source...
    Or directly related to language packs?
    It's been a while since I played with gnome but aren't there settings independent of gnome-tweaks?
    Sorry for speculations--just looking for a place to start.
    edit: clarity maybe

        Unless a GTK theme hardcodes the use of a font, they have nothing to do with the GTK theme, and typically themes have suggested fonts rather than required ones (such as Noto, Roboto, etc. like is the case with Plata and previously Adapta). They certainly have no relation to icons.

        Or directly related to language packs?

        Doubtful.

        brent It's been a while since I played with gnome but aren't there settings independent of gnome-tweaks?

        No, it's the whole point of GNOME Tweaks.

        conky: can't load Xft font 'Droid Sans:bold:size=10

        Well for one, you're missing a single quote, so it's probably trying to load a font literally named "'Droid Sans:bold:size=10", which isn't valid. Second, you may very well need to relog for the window title fonts to apply, and they're probably not going to apply to GtkHeaderbars.