How to change language in HTML CSS?
In a nutshell
Always add a lang attribute to the html tag to set the default language of your page. If this is XHTML 1. x or an HTML5 polyglot document served as XML, you should also use the xml:lang attribute (with the same value). If your page is only served as XML, just use the xml:lang attribute.
What is a language switcher?
A language switcher gives your site visitors the possibility to switch between the languages you provide on your multilingual site and thus to read the content in their preferred language. With MultilingualPress you can set up a language switcher either via a navigation menu or via a menu widget.