To change Google's settings to Spanish, visit Google.com, click Settings in the lower-right corner of the page, select Search Settings, and then click Languages. Choose Espanol from the list of languages, and then click Save.
After you designate Espanol from the options, Google language settings take effect immediately on all Google products and services. If you are not signed in to a Google account, the changes take place until the browser signs in to an account that has different settings or the browser's cookies are cleared. If you change language settings while signed in to a Google account, Google saves it permanently to the account until the process is repeated and you choose a new default language.