If Browser is selected, the Accept-Language request header will be checked for the current language. The configuration screen allows you to map language and locale tags defined by the World Wide Web Consortium (W3C) to languages installed on the site. For more information about the language tag specification, go to https://www.w3.org/TR/ltli/. Text entered for the language code is compared to the value from the browser after converting both to lowercase to avoid case issues.

Browser language detection configuration