I'm working on scripting up a conversion of d20 Modern into the 5e ruleset into Hero Lab via the inbuilt editor, and have a couple questions as to whether or not it's possible to do some of the things I would like to do. If anyone can point me in the right direction, the help would be greatly appreciated 
That's it for now, but I'll probably have more later.

- How would I change Common into something else (i.e. English)? I can Preclude Thing to hide all of the other languages when my source is selected, but I don't know how I can get rid of or rename Common.
- The classes do not have completely fixed ability proficiencies. For example, Charismatic Hero gives proficiency with Charisma and one other ability score of your choice. How would I implement the "one other of your choice" thing?
That's it for now, but I'll probably have more later.