Interesting article on Catalan nationalists joining the Esperanto movement early last century. Designed to a universal second language, Esperanto defended the right of regional minorities to use their own language, and offered opportunities for them to showcase their culture.
@jayeless That is very interesting. Somebody told me that there is (was?) a very large number of Esperanto speakers in China, because there was a time when the internationalism of Esperanto appealed to the Chinese communists.