In addition to specifying the language that your content is written in, you can also specify particular countries that you would like to target. By doing this, each page points to every available localized version of itself, making it easy for search engines to understand the structure of your site and display the appropriate translation for every user. Keep in mind that this block should be added to both the original and the localized versions of your page (in this case: /about/ & /vi/about/). If the primary language of your website is English, for example, and you want to translate it into Vietnamese, then every translated page should include the following block of code in the  section: In addition to the language attribute on the  tag, each page should also include a  section in which links to its localized equivalent are listed. When translating a website it’s important to ensure that search engines are able to understand exactly what language (or languages) your content is available in. Vietnamese Localization Tips Localizing websites using hreflang meta tags