esperanto_story1-9, Exercise 2: Different aims, different answers

Model answer (check the details):

Esperanto and Klingon. Esperanto aimed to be a neutral second language for everyone: as a world language it did not succeed, as a community language it has lasted 130+ years. Klingon was made for a fictional people in film and television: it worked as an artistic language, and a fan community learns it, though it was never meant for general communication.

Esperanto and Interlingua. Interlingua aimed to be readable by Romance-language speakers without study: that test can be passed in its own terms, while it has a small community. Esperanto aimed at all learners.

Point: "Did it work?" has no answer until you name the aim.