When Google recognizes that the contents of a web page are not in the language that the user is likely to want to read, to provide better content for users Google often provide a link to a translation in the search results. This feature gives you the chance to display your content in an understandable way to a much larger group of users. However, if you don't want this feature you can disable it adding this meta tag after the <head> tag of your website:
<meta name='google' content='notranslate'/>
This meta tag tells the Google that you don't want to provide a translation for your website.