Gotcha - I just realized that in Russian version of Microsoft Word, B (bold) actually says Ж (жирный - in Russian). That’s probably another small thing that would improve on usability of the message composer.
Can this and other letters in the toolbar be made translatable?
Very interesting. Unfortunately that’s not going to be easy to translate as the buttons are icons from font awesome. The bold one for example is fa-bold which is a B.
With some coding we could add support for changing the icon in other languages, but I doubt font awesome has one for the Russian character you listed. I suppose we’d have to add the ability to replace an icon with just a letter (if it’s in the translation file.)