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[Joern Rennecke]

> > Are you sure?  I guess I don't understand GCC's i18n support.  Stan's
> > proposal has part of the message in the user's source code.  How would that
> > ever end up in gcc.pot?
> 
> Forget it. I wrote that much too late for me and didn't think straight. Of
> course this is user code so it would always be in the language it was
> written in.

No, it is library code.  The provider of the library might speak a different
labguage than the user.
So it does make sense to provide a few standard phrases with translations,
and recommend to use one of these to get internationalized warnings.