About lack of that information in Russian version of the T&C, we kindly ask you to refer to this page -
https://vave.com/ru/help/sportsbook-rules 2.18: “B cлyчae pacxoждeния мeждy вepcиeй нacтoящиx пpaвил нa aнглийcкoм языкe и любoй дpyгoй языкoвoй вepcиeй, пpeимyщecтвeннyю cилy бyдeт имeть вepcия нa aнглийcкoм языкe.”
English: “In the event of there being a discrepancy between the English language version of these rules and any other language version, the English language version will prevail.”
Thereby we highly advise to check all the rules in English version instead, as it always gets to be updated first.
In that clause, you specifically stated "these rules," indicating that it applies solely to the "Sportsbook rules" and doesn't touch upon the general Terms of Use, which aren't even mentioned in a single word.
Expressio unius est exclusio alterius. The "Sportsbook rules" don't include any regulation that limits a player from Russia in either the English or Russian version.