printk() indexing

Thinking about this I'm not sure this variable actually does what you (and I!) were hoping though. I haven't tried it and the documentation is not clear enough.

What I was hoping is that this list is consulted on a per-message basis, so that if a given message was not available in one language it would fall back to another. But maybe this is not the case: maybe it will open only the first catalog of your preferred languages that exist, then stop.

So if the preferred catalog exists but is missing some messages, then you'll get the default message (whatever is printed in the "C" locale) not the fallback.

I could be wrong: I didn't test it.