Jaikoz slightly messes up roman numerals ( often used in classical music to label movements of a work) by treating them as words and case changing e.g. in “Local Correct->Titles”. Unfortunately it can’t just be done robustly algorithmically in general, as some rare ones are also dictionary words (e.g. MIX). However these are sufficiently rare that a “don’t lowercase if it looks like a Roman numeral” might still be valuable.
Auto correct and Roman numerals
I don’t think the demand warrants the development really, but you could use Scripter and the power of JavaScript to roll out your own version
Agreed, this is an issue of lesser importance.