Hi!
I’m Spanish and I have noticed that the included Hunspell dictionary for the Spanish language is outdated and not very complete, so spellchecking results in a lot of false positives.
Could you update the dictionary and affix files to the ones in the
RLA-ES project? These are the ones currently used in the Firefox spell checker and many other applications. This Spanish dictionary is not perfect but it’s definitely better and contains more words than the one provided with Sigil.