WordPress Plugin i18n, Webpack, and Composer (developer.wordpress.com)

A lot of work has been going on in the Jetpack plugin lately. We have UIs built in React, with the JavaScript bundles being created by Webpack. We have Composer packages used for code sharing, increasingly so as we look into creating standalone plugins like Jetpack Backup and Jetpack Search. And we want everything to be translated for people who speak languages other than English.