Function lang2 in C

"Ricardo Rios" <alfilnegro.sv at gmail.com> writes:

I have a source code in C, it use the function lang2 ,does somebody
know what does this function do. Thanks in advance.

It creates a language list.  This is a Lisp-style pair list.  A common
use of it is to build a function call to pass to eval.

+ seth