A member of my party I DM for has Reading Spectacles, whose text is simple:
You can read any language (the spectacles do not grant the ability to speak or write a language).
I would like to present them with a text whose script is Barazhad (i.e. the alphabet of Abyssal or Primordial) but the actual words are in Supernal.
It seems apparent the reading spectacles ought to let the reader decipher the Barazhad; the question is, will they be able to understand the Supernal words written?