The ID of the default locale for this plugin, for example,
Locale object for this plugin.
localeId is optional, and if not specified, the current locale is returned. This is the locale for the current user’s session.
In general, you should not pass in a
localeId, as in almost all cases, you need a
Locale object to translate the UI for the current user.
To obtain a
Locale object, you would almost always use code like:
let locale = P.locale();