1) Should the adjective/adverb incognito be used only for males? M-W says:
Definition of incognita : [...] —used only of a woman
But M-W's definition of incognito simply says
with one's identity concealed
So is incognito truly unisex ? What about plurals/mixed-sex/unknown - are they all incognito too?
On ngram I see hits for he was incognito but negligible hits for he/she was incognita or she was incognito.
2) Since it has a Latin root and from what I can figure out from Wikipedia, in Latin the feminine and neuter versions are both the same, i.e. incognita, so, it seems strange English default is incognito?