If URL is selected, you are able to use either a path prefix or subdomain to be checked for the current language. The default configuration is to use a path prefix that corresponds to the code for the language, with the site default language used if no prefix is provided. For example, /node/1 would display the English version of the site and /es/node/1 would display the Spanish version of it. If subdomain is selected, the URL es.example.com/node/1 would retrieve the Spanish version of the site.

URL language detection configuration