If set, provides a search path for index configuration files — an ixlang.cf file, and one each of the index configuration control files: a .col file, a .grp file, and a .chr file. The default path is Arbortext-path\lib\ixlang.

You can make custom versions of these files automatically available by using the Arbortext-path\custom\lib\ixlang directory to load them automatically upon startup. If you create a custom file for a particular locale, you can put it the appropriate locale-name subdirectory of Arbortext-path\custom\lib (such as in jpn for Japanese).