esperanto_story1-9, Exercise 1: Four tests

Model answer (check the details):

Neutral: partly. Roots are mostly Romance and Germanic with some Slavic, so it is more neutral than a national language but less than its founders hoped.
Easy: mostly yes. Regular grammar, a small set of affixes and one sound per letter help, especially for those who know a European language. Precise speed claims come from small studies.
Used: partly. A small community uses it for everyday life and publishing, but no state or international body has adopted it.
Real language: mostly yes. It has native speakers, new words and idioms, though on a small scale.

Care: tie "linguists say" statements to named sources.