Supported Languages - Is an upgrade to Captivate 7 required?

Hi,

I am novice user of Captivate. Currently, I am working on Captivate 5.5. It would help if any expert out there could help me with the following:

1. Is Russian language is supported in Captivate 5.5? I tried typing out some text in Russian on a slide; the content shows us just fine in the preview mode. But, I would like to update the tools tips in the Skin Editor and the TOC as well. My guess is that if Russian is not supported in Captivate 5.5, it will not be possible to update the Skin Editor etc. Is that true? If so, what if I upgrade to Captivate 6 / Captivate 7?
2. I would also like to use the text-to-speech option for recording audio is Russian. Is a Russian voice available in any of the versions of Captivate? Does it come as an add-on or will I be required to purchase it?

Thanks a lot for helping.

Regards,

Priya