Until now, you had to build your application once per locale, and this was a full build. So let’s say it’s a 30s build, and you wanted 4 locales, then you were in for 2 minutes.
With the new approach, the compilation is done once, and then the various i18n versions are generated in a few seconds (it is even generated in parallel if possible). So you go from 2 minutes to ~40 seconds! 🌈
You then have several bundles, one per locale, and you can serve the appropriate one to your users depending on their preference as you used to.