At this time, there are no plans to add Spanish word lists to VocabularySpellingCity, but I will share your suggestion with our development team.
Did you know that you have the option to add a definition and sentence for any word not currently in our database when your list is entered and saved through List Management? Please note that special characters are not recognized by our system, however, so accents will have to be left out of Spanish words.
I hope this helps!
Sincerely,
Nancy
VocabularySpellingCity Support