I have reservations about this enhancement.
Introducing language specific icons for BOLD and ITALIC is not a good idea. It may make sense for the languages that use Latin script. According to me, these are some standardized icons accepted by all the
language communities irrespective of the software applications that they
use.
A normal computer literate is familiar with the current B and I icons available in all the word processors, text editors, and other editing tools. Most of them are aware about its use also. So changing that to a language specific icon may remove that edge. We have the tool tips for an icon to convey its usage. I think that is more than enough.
If we are changing the BOLD and ITALIC icons then we need to consider lot of other similar icons strike though. Also this move may affect the cross wiki contributions also.
Shiju Alex