Hello there, it's the first time that I'm going to do a small site in Russian (a translation of an existing English site). I've trawled the Internet for a definitive answer on what the language settings have to be in the HTML code, but I'm not so sure now...

I think that I need:

<META http-equiv="content-type" content="text/html; charset=utf-8">

Do I also need:
<html lang="ru">
If so, what exactly does this do?
I've never put <html lang="en"> in any of my English sites...

Many thanks