lcid 
Mapping between standard locale identifiers and Windows locale identifiers (LCID)
Based on the mapping used in the Python standard library.
The mapping itself is just a JSON file and can be used wherever.
Install
$ npm install --save lcid
Usage
var lcid = require('lcid');
lcid.from(1044);
//=> 'nb_NO'
lcid.to('nb_NO');
//=> 1044
lcid.all;
//=> {'af_ZA': 1078, ...}License
MIT © Sindre Sorhus