Problem

Trying to answer #22971 it struck me that a compromise that may be quite useful is to make sure that the text is editable with the TexText plugin for Inkscape: https://textext.github.io/textext/

I have not looked at it into detail, but am under the impression that it stores the original expression in the element. Right now we do that as a comment, so it wouldn't actually bloat very much to change it (or have it configurable through an rcParam).

Proposed solution

Study the generated SVGs from TexText and adapt storing the original string in that format. (Maybe it is even documented?)