How do you say i understand Russian in Russian?

There are a few ways to say "I understand Russian" in Russian, depending on the context and level of formality:

Formal:

* Я понимаю русский язык. (Ya ponimayu russkiy yazyk.) This is the most common and literal translation, meaning "I understand the Russian language."

Informal:

* Я понимаю по-русски. (Ya ponimayu po-russki.) This means "I understand in Russian" and is a more natural way to say it in casual conversation.

* Я понимаю русский. (Ya ponimayu russkiy.) This is a shortened version of the first phrase and is perfectly understandable.

* Я знаю русский. (Ya znayu russkiy.) This means "I know Russian" and implies a higher level of fluency.

You could also use a phrase like:

* Я могу говорить по-русски. (Ya mogu govorit' po-russki.) This means "I can speak Russian," which implies that you can also understand it.

The best way to say it depends on the situation and who you're talking to.