Mozilla Firefox : Proxy server changes the langauage

Problem: I faced this issue, that if I am using a proxy server in some other country. Then for the websites which chose the language based on the country of the client, making the request. It will open the page as per the location of proxy server.

In my case, I was using a Japanese proxy server, so typing Google.com will take me to Google.co.jp and open the search results in Japanese.

Solution: Change the language preference in "Tools > Options> Content". After this webpage was presented in desired language.