Thanks for the reply. Who learns/knows Esperanto? I am more interested in this now than the movie.
All kinds of people learn/know Esperanto. The main motives are typically:
* an interest in learning a language that's by design much more regular and enjoyable and fast to learn than national languages (it's the only language I've gotten fluent and good at besides my native language English, which was a true joy for me. I am still struggling with Polish despite living in Poland for several years.)
* an idealistic interest in a fairer neutral second language instead of expecting everyone to learn English, which is far harder (like all national languages) and gives native English speakers a huge economic advantage. In that sense, it's a bit like supporting Linux over Windows.
I personally know hundreds of all kinds of people (geeks and non-geeks alike) from dozens of countries whom I met speaking Esperanto. (Including my wife - it's our primary language at home.)
It's kind of a diasporic language, not being based in any particular country, so the easiest way to meet up in person with a large number of different Esperanto speakers is at conventions. E.g. we were just at a big one with 1400 or so people in Copenhagen. (Being game geeks, we typically play games at these things as well...) There are indeed interesting parallels between the boardgame and Esperanto communities.
I suppose the wikipedia article
is as good an overview as any, and if you are interested in learning Esperanto, I recommend lernu.net