If you would like to change the default search engine and language that is used when you are researching keywords, you can easily set this up in your account profile.
Simply click your username in the top right of your screen and then click on the "account" link. You should arrive at your user profile.
In the center of the page you will see two options, just select your desired search engine and language from the dropdown, then hit "Save Account Settings"
If you have any questions about this, please contact our support team by clicking the support icon in the bottom right-hand corner of this page.