Best way to add i18N support?

[gtamas]

Hi!

I just want to add a library which allows me to detect the current locale and translate the responses I'm sending (controller code).

So what's the beast way to implement this? The node-i18n library seems to be a good candidate, but Loopback doesn't seem to support it, although it exports an express middleware.

I did this:

// Application.ts

    i18n.configure({
      locales: ['en', 'de'],
      api: {
        __: 't',
        __n: 'tn'
      },
      directory: join(__dirname, 'locales'),
      defaultLocale: 'en',
      header: 'accept-language',
      queryParameter: 'lang',
      objectNotation: true,
      preserveLegacyCase: true
    });

    this.expressMiddleware(i18n.init);

However, Loopback throws an error on each request (TypeError: handler is not a function).

So is this library supported? If it isn't, what should I use to multi language support?

Thanks in advance!