Automatic language binding between different source and target domains eliminates the tedious and error-prone task and enables easy switching between different languages for best support, e.g., select the best suited language for a given problem. The language binding currently is able to bind any kind of constants and functions between two languages. Language binding of variables are not supported, since this would be a name space and recognition problem. If a variable needs to be accessed from another language, a functions to get and set the value must be written. All functions necessary for the language binding between C and FORTRAN are part of the VBS project. The binding code needed for target domain VLisp is already integrated in the VLisp interpreter.