If Netlify customers want to work with locales in Node, they'll need to have full-icu support installed, and Node does not ship with this by default. Only en-US is provided, although there have been discussions to include full-icu by default..

Support, in theory, can be added by using the npm package full-icu but it does not seem to play nicely with NVM, and it requires an environment variable or command line switch to work (disclosure: I can't get it to work).

Would it be realistic to either: build all versions of Node with full-icu support e.g. --with-intl=full-icu and live with the extra 15MB or so that it will add to the binary, or provide an option to build a version of Node with it included?