Language environment is a set of standard callable routines and run-time options that can be used in any application that is written in a programming language that supports LE. It is intended to facilitate the development of mixed-language applications. This is provided with HotFix 4 of Visual COBOL and COBOL Server 2.2 Update 2.
For more information, see General Reference > Language Environment (LE) Support in the Visual COBOL product help.