Bug#886728:

[Dmitry]

The issue #886728 is related to display of Russian text in the "text
object" and ability to render russian characters in default
installation of Blender. GUI of Blender is able to display Russian text
correctly from the start. I think it is different from #833962 where
from the description it is more about UI. 

Default font Bfont, that Blender is using for render preview is a .pfb
and doesn't have international support. The report about not being able
to enter text into "text object" has been accepted in the to-do list
for future blender releases. https://developer.blender.org/T53744

I believe this bug is not related to debian.
Although if we can patch the blender code to use international font by
default, bfont.ttf (that is part of distribution) we could resolve this
 issue faster. Please decide if you consider this still a bug for
Debian Blender package. 

Please note that Debian related patch https://anonscm.debian.org/cgit/p
kg-multimedia/blender.git/tree/debian/patches/0006-
look_for_dejavu_ttf_with_fontconfig.patch?h=debian/2.79%2bdfsg0-2
for Blender is looking for "Dejavu" font, while should be looking for
"DejaVu". I don't think this is part of any reported bug so far. Please
advise if you think this deserves another bug ID.