Book excerpt: Multi Linguis offers you a frequency-thematic dictionary of the Ido language. It includes up to 1'500 essential lemmas belonging to the Elementary level. The entries are divided into 300 vocabulary themes as well as 1 importance level. They are arranged by themes, not by the alphabet. The book is intended to help you learn this language or revise your vocabulary in a thematic way, but can also be applied for translating or entertaining. You may use it separately or as an additional tool for any suited educational course. You can find full version of this and other dictionaries of the Ido language on https://multilinguis.com/languages/ido-l/.