Paul,

Thank you very much for being so willing to help me!

I tried your code on a few pages. It looks like the spell checker does not understand basic Spanish words, such as prender ("to seize"). In one run, it even prompted to confirm on si ("if"). I experimented with setting different proofing languages (not sure if it's needed), Spanish (United States), Spanish (Mexico), English, ... It doesn't seem to make a difference.