Well Carrara does have plugins... for extensibility. I think choosing a language also has to consider what capabilities it has in relation to it's purpose. Languages can have some limitations where you have to go about things in an odd way. Personally, there are other things I think carrara needs more, since it has plugins. Reusability of motion or just macros or yes maybe a simple scripting language where the interpretor does more or the work. Perl is a bit awkward tho (imo). Altho, ruby is very interesting.

No need to think outside the box....
    Just make it invisible.