Use multiple source files and have a plug-in system for the "languages"?

### 🤔 What's the problem you've observed?

When I've talked to other people about this script, I've heard feedback that it's intimidating.

### ✨ Do you have a proposal for making it better?

I'm thinking that the code would be easier to read if it was broken over multiple files. This could enable us to make the language "plugins" each live in separate files.

### 📚 Any additional context?

A consequence of this would be that we'd have to change how the tool is deployed (since it currently assumes it's a single file).

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