Hey, and so sorry about the long wait! Unfortunately this issue still hasn't been fixed, but Feniks figured out a workaround: /__site/feniksdev.itch.io/inline-conditions-for-renpy/devlog/1723160/engine-tran...
If you add
if renpy.version(True) < (8, 6):
text_input = renpy.translate_string(text_input)
to the beginning of the add_speech_pauses function, this should hopefully work!