When you ask for programming languages, are you refering to what it is developed in, or what is usable with the engine. Also when you refer to Fortran, Perl, Ada, etc, would Fortran.NET, Perl.NET, and A# (for Ada) be considered equivelent languages, becuase it uses the same syntax, just a different compiler. Also I would suggest that you add a category list to the Scripting section. This is a critical feature and you can easily categorize them or use specific languages. Example List:

C#
VB.NET
Perl
Python
Lua
JScript
Java
Same As Development Language
Custom Language (Simple)
Custom Language (Full-featured)
Other Common Language
C++
XML --- Yes this works
Visual (Macros, Run-Time Parameters)