How to Change Google Home Page Language
When you use Google's services, such as their home page search engine, you can choose to have the search results and the interface itself be in whatever language you prefer. Be aware that when you alter the settings for the main page, they affect the settings for all of the Google online products.
Go to www.google.com and click on the "Search Settings" link in the upper-right portion of the website.
Select your preferred language to have the Google interfaces displayed in under the "Interface Language" section.
Select which languages you would prefer to see your search results displayed in.
Click the "Save Preferences" button on the bottom-right portion of the window to save and immediately apply your preferences changes.