Hi, so sorry I didn't see this until now! To be honest I never tried out the self-voicing functionality in Ren'Py myself so this issue never occurred to me. That does sound cumbersome to have to do in your script! I will look into this more and then get back to you, hopefully I can find a solution
Sorry for the maybe dumb question; is the hover text an issue in default Ren'Py choice menus too, or only when you use this add-on? And when you say hover text do you mean the tooltip, or just any regular choice text on hover?