When actors are talking, they are servants of the dramatist. It is what they can show the audience when they are not talking that reveals the fine actor.
English is necessary as at present original works of science are in English. I believe that in two decades times original works of science will start coming out in our languages. Then we can move over like the Japanese.
Little Sparta is a garden in the traditional sense. It is perhaps not like other modern gardens, but I think that other times would have had no difficulty with it.