First set the QUINTUS_LANGUAGE environment variable to
language. Then re-install Prolog, following the normal
installation instructions.
When using qld to build stand-alone programs users will also need
to have the QUINTUS_LANGUAGE environment variable set. Therefore, all
users who wish to use the translated messages should arrange to set
this variable in their .login or .cshrc files.
qpc is itself a Prolog runtime system. Therefore, if it has been
installed with English messages it will need to be re-built with
messages in the preferred language. To do this, the qpc in the
directory (B) should be deleted before re-installation.
quintus-directory/binversion/platform (B)
In multilingual environments it may not always be convenient to have
different versions of executable files for the language spoken by each
user. An alternative is for users to put (C) in their prolog.ini
files. Provided that they have set the QUINTUS_LANGUAGE environment
variable, this will ensure that the messages in their chosen language
are loaded whenever they start up an executable that was created with
messages in some other language.
:- use_module(messages(language('QU_messages'))). (C)