locale (site language) (tag)
determine_locale() | Gets the current site locale (site language, ex, en_US) desired for the request. |
get_locale() | Sets the global variable $locale and gets the current site locale (for example, en_US). |
get_user_locale() | Retrieves the locale of a user. |
is_locale_switched() | Whether switch_to_locale() is in effect. |
sanitize_locale_name() | Strips out all characters not allowed in a locale name. |
switch_to_locale() | Allows you to switch the site language programmatically. |