In message , Custos Custodum
writes



Not many people write "shewn" for "shown" these
days.

I recall 'shewn' in my primary school arithmetic books, Mind you, it was
some time ago.

As for Latin plurals, I feel that in cases where the Romans would never
have used that word for something (either because the thing did not
exist, or if it did exist, we now use the word for something somewhat
different), the Anglicised ending is usually preferable. I really cringe
when I hear the pretentious 'musea', 'stadia' and (topically)
'referenda'.
--
Ian