I was just wondering before I get proclaim if its possible to use other languages such as Russian.
Yes you can. However, Proclaim's user interface is only in English, but you can type or copy and paste Russian text into Proclaim. It should work like I show below:
Also, here is an article that explains this all a little more.
http://support.proclaimonline.com/hc/en-us/articles/204174879-How-do-I-use-Proclaim-in-another-language-