what about russian social networks?

In Russia there are two most favorite social networks: vkontakte.ru and odnoklassniki.ru
do you plan to include they in social plugin?
or may be I can write some plugin for they?

We never heard about these social networks so there is no plan to include them.

If you can write a plugin, that would be great indeed !

could you get me the clue there can I get documentation for writing plugin for hikashop?

That documentation is available here:
www.hikashop.com/en/support/documentatio...r-documentation.html

But there is nothing particular for the product page.
So you might rather look at the social networks plugin for an example.