Meaning of Proofed?

l10n
#1

In printing context, 'proofed' means it's ready to be printed in
some form.

       This sentence:
          'No language is selected in the proofed section'
         therefore is grammatically in-correct -
          (1) language is not proofed, although the written language can be
edited;
          (2) proofed is not synonymous with proof-read, although while
editing one can proof-read for accuracy;
       therefore, I would assume whoever wrote this line, probably meant to
say something to the effect that
           no language has been selected nor has the content been
proof-read and therefore is not ready to be printed.