Looking at the "about Esperanto" page, I see this line:
While he realized that a common language would not end the cultural barrier, it would enable ordinary people, not politicians, to have cross national conversations. To this end, he created Esperanto, a language that would be easy for most people to learn, due to it's logical, regular design.
Speaking from experience, one of the difficult parts of learning a new language is keeping different meanings straight for words that have different meaning. It's a little hard to bear at times how many words mean many things.
Does Esperanto, with it's "logical, regular design", have any homographs?