found this bug on a post on my site someone wrote this
Приветствуй, товарищу!
as you can see it shows just fine But if you quote this it change's (some of the letters change)
and if you try to copy and paste from the quote it will show up right
This is down to the font. I suppose we could change the font, though interestingly none of the Russian translators had reported this. Changing the font is a really blunt tool for this.