English-International Dictionary

The English-International Dictionary by L. de Beaufront and Louis Couturat is a bilingual reference for the constructed language Ido, a simplified and reformulated version of Esperanto. Designed to facilitate international communication, the dictionary pairs English words with their Ido equivalents, promoting logical structure, regular grammar, and ease of learning. Published in the early 20th century, it played a key role in the early Ido movement, reflecting the language’s philosophical and linguistic foundations. The work emphasizes precision, consistency, and international neutrality, embodying the authors’ vision for a practical, universal second language to foster global understanding and cooperation.