Hi there, The topic has been brought up on IRC yesterday but I've found wondering myself the same thing in the past: What error messages should be marked for localization?
In particular, most of the back-end libraries create "stuff is horribly broken" error messages whose specific contents is only meaningful to experts but not to ordinary admins or client users. We are quite inconsistent about the usage of _() in those libs and I myself wasn't consistent about it either. I suggest as a policy (in case that isn't already in place) that error messages shall not be localized id the user / admin cannot reasonable act on them. Specifically, I suggest that all "data corrupted" error messages become non-localized. If there is something that a user can do about it (transient network failure), higher levels should wrap the error appropriately. -- Stefan^2.
