vowelsme:

If you use Chrome (and you should, because it’s awesome) and are learning a foreign language, you should definitely install this extension. What does it do?

Polyglot [the name of the extension] translates randomly selected words on the sites you visit into a language of your choice, allowing you to learn and practice foreign vocabulary while you browse the Internet.

So if you’re studying Russian, you can set it to translate 1 out of every 20 words from English to Russian. And you can hover your mouse cursor over the word to see the English version. Very cool.