I have a folder of approximately 120 precedent letters, all in English
(US). Is there a function, script or 3rd party add-on/product I can use
to change this property so I can select English (Australia) for the
lot, or am I going to be forced to open each document individually,
select ALL and change manually?

I have searched the group and can't find an answer, apologies if I have
missed one...

Thanks in advance,
Paddy