@Graham you seem to be talking about a different “problem” which is not actually a problem.
If you want to volunteer to translate and maintain 20 or 30 different languages yourself then maybe we can support all of the languages of WordPress.
Otherwise, that would mean that we have the few languages that we can support at 100% translation coverage, and all the rest at around 95%, with random strings missing and in English. These non-translated strings would be all the places where ClassicPress has changed user-facing text. Hopefully you can see why this is also not ideal.
We’re open to adding more languages after we have things working smoothly for the first batch of 10, but for now, ClassicPress supporting 10 languages is intended.
We could also add a more prominent link to @rui’s plugin, but we’d have to make it clear that people using that approach should not expect 100% translation coverage.
Hope that helps. In the future, if something isn’t working as you’d expect, please ask questions rather than assuming that you already know what’s going on