Essentially take your mouse over to the language switcher, and it will show the choice for changing administrator region to English. When you tap on "Switch to English" join, it will reload the administrator screen in the English language.
When you need to change back to the local language, you can do that from the same menu.
If you conduct a blog and speaks good English, why not expand the audience at the expense of the English-language version of the site?
An important argument in favor of a multilingual site - is the cost of clicks on advertising. In the Russian segment, it is significantly lower than, for example, in the English language resources.