Content files are reusable chunks of HTML markup that can be used anywhere on the site. The content of the help popups used on this site are stored using content files.
You can translate content files via the back-end area, when selecting the menu item called Pages.
Every part of this theme can be translated to another language. Even this content you are reading now!
The drop-down in the main menu is called a Locale Picker. It lets you quickly switch between any of the available languages when browsing this website.
For help on setting up more languages, close this popup and click the Languages menu item.