affects 981577 + fbreader thanks Another manifestation of the issue: broken rendering of cyrillic symbols by the FBReader e-book reader.
Note that the ttf-bitstream-vera package description points users of non-latin fonts into the right direction: "Non-latin scripts are not supported (use ttf-dejavu instead)." but does not stress it enough that the "instead" word should be treated literally. (Not to mention that the referenced package name should be changed to "fonts-dejavu" nowadays.) P.S. I tried patching the /etc/fonts/conf.d/60-latin.conf locally as was suggested in a similar bug discussion (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=961389#15) but it didn't work for the cyrillic issue by some reason. So, I ended up removing the ttf-bitstream-vera package from my system, (luckily, I had no other packages depending on it). P.P.S. I think, something like the following could be used for quick test of the preferred Bitstream Vera font on your system: fc-match --sort ":family=Bitstream Vera Serif" |head -- ...Bye..Dmitrii.