No idea - I work on the basis: if you don't ask, you don't get and am an inveterate optimist...
It will surprise no one that I originally read that as "invertebrate optimist" ...
However, there is one issue that does sometimes puzzle me - namely that while I understand that regular plural nouns are excluded from the database, surely this should not apply to verb forms that happen to resemble noun plurals by way of spelling?
Indeed,
ceases provides possibly a canonical example, as it is not only a verb, but a 3rd person singular present tense form. Yes, this spelling also appears in present tense plural forms, but that's a consequence of English increasingly dispensing with declension and fully inflected conjugation over the passage of time.
I am also at this juncture wondering how hilarious it would be, to try and construct a Latin version of the game, with all manner of rules that would include or exclude the myriad inflected forms that pervade the vocabulary ...
If that isn't a daunting enough prospect, try a Classical Greek version ... made all the more difficult by the existence of grammatical constructs not found in other languages, such as the middle voice and optative mood for verbs, not to mention Greek verbs being based upon aspect instead of tense ...