The following commands help you find out which language is the working language, and also which language source files were written in.
Display the current working language. This is the language you can use with commands such as print to build and compute expressions that may involve variables in your program.
Display the source language for this frame. This language becomes the working language if you use an identifier from this frame. See Section 6.4, to identify the other information listed here.
Display the source language of this source file. See Chapter 10 to identify the other information listed here.