It’s rare for me to play on a casino with a domain using a country like “.ru”. Are you sure that your casino will mot be limited to Russian citizen since the country have a sanction on multiple country which you might find restrictive when you accept players from country that sanction it.
The default language is in Russian which I’m not where is the translation button for your casino. I really suggest to have a mirror link for global players so that it can be easily play or browse on your games that is on default RU players.