Multiple dictionaries, Russian ё and trackball

Thank you very much. Scrivener is a fantastic program and I really enjoy it.

And there are some things that probably may be done to make it even better for me:
(1) Sometimes I write bilingual texts (an article is in Russian and some titles, notes, references or abstract should be in English). It would be better if for spelling I could use both dictionaries English and Russian at the same time.
(2) Minor wishes: most Russian-speaking people don’t use letter ё for writing, but some prefer to do it. As for me, dictionaries which can recognize Russian Ё are preferable.
(3) As a lucky owner of Logitech trackball Trackman Marble, I have found that Scrivener does not support such scrolling options as Universal Scroll and AutoScroll for trackball that are set in Logitech SetPoint but I can scroll by holding mouse in the other hand.

Thank you again and best wishes.