option for specifying lanugage?

[sen_ml@eccosys.com]

is there a way to specify an option to gnupg to get it to choose which
language its messages are outputed as?  something like the "lang"
option in pgp.  note: i mean command line option -- not specifying the
contents of an environment variable.

the reason i ask is that, a user might want to view messages in one
language other than english (e.g. when using gnupg on the command
line), while software has been written to process gnupg messages in
english.

i bring this up because i saw mention of it on a mailing list for a
particular mail client today.