Oop Hey there Wattson! Turns out that was user syntax error on my part--I used this as part of a custom text tag (I can't quite wrap my head around omegatags just yet) and opened the "i" renpy.TEXT_TAG with a curly bracket instead of an open parenthesis.
I did want to follow up--i'm having trouble getting the custom tags to combine the kinetic tags with custom fonts. Is there something I can do about that?
Thank you again for making such a fun tool! :D