How to Unblock my server IP from google translate

Hi guys, I use a WordPress plugin to translate posts. But recently it's not translating. I checked plugin log and it says Google translate is access denying to my website ip. And it says to use some proxy.

How can I Unblock my site ip? I don't have money to buy private proxy.

Are you able to install VPN client on your server?
Then you could use free VPN, for example this one.