There are many different programs with which you can change your proxy server. One-clicking, and you're from Russia.
Here are the names of some of them:
Proxy Switcher
SafeIP
A4Proxy
On the internet you can find many of these programs, and they are free or have a trial period. Can try if you don't succeed, i guarantee that you'll return all your keys.
What will happen if we download after changing back to our normal net? Do we have to apply the language patch? Can we download and play normally after on?
You will be able to play normally. Available languages - those that are in the steam on the page with the game.
I've done a similar thing with Dark Souls 2, i took account of my friend in Poland, activate the game and now he plays it quietly, without any problems, the same thing here.
Note: This gift has limitations. It can only be activated in the following countries: Armenia, Azerbaijan, Belarus, Georgia, Kazakhstan, Kyrgyzstan, Moldova, Republic of Moldova, Russia, Tajikistan, Turkmenistan, Ukraine, Uzbekistan
Get rid of this limitation in two ways:
In the second case, all correspondence will be in Facebook, also you would need to provide me with a one-time password that will come to you email, after i try to access your Steam account using my computer.
About the risks: such a thing I've cranked out twice with my foreign friends. If gift can not be activated, i'll give you your keys. I understand that the transfer of your account very risky, but i guarantee that i will not use your account and erase your username and password immediately after activation. You may at any time withdraw from the transaction.
My reputation is very high and i do not intend to deceive someone and spoil your reputation.
Note: a copy of the game i have only one.
If you have any questions, write them here, i am happy to answer them.
Thank you.