iLib
iLib is an internationalization library written in pure ES5 Javascript. It does not require any other libraries to function, and can run equally well in various older and newer browsers, on various OS's (including mobile), nodejs, webOS, Qt/QML, RingoJS, React/Enact, or rhino. More elaborate documentation can be found here.
ilib-webos?
This package is for webOS platform. Most of the JS code is the same as the ilib module, but There'are some difference with locale JSON data.