via make.wordpress.org => original post link
5 years after announcing the Preferred Languages feature project and implementing the first prototype, it’s time for a long overdue update on where things currently stand.
More than half of all WordPress sites in the world use a language other than US English. For these sites and users, the options to change the site and user language are great. But when there’s no translation for a given plugin or theme, WordPress falls back to US English. That’s a poor user experience for many non-English speakers.
The Preferred Languages plugin solves this issue by doing the same thing operating systems, browsers, and other types of software have been doing for years. It lets you select multiple preferred languages in your settings. WordPress then tries to load the translations for the first language that’s available, falling back to the next language in your list.