Interlingue, also known as Occidental, is a constructed language created by Edgar de Wahl in 1922. It is one of the earliest and most successful constructed languages.
Interlingue has a simple grammar and a relatively small vocabulary. It is based on the principle of internationality, and so includes words from many languages.
The language is designed to be easy to learn, and to be accessible to as many people as possible. It has been successful in this regard, and is used by speakers of many different languages.
Interlingue has been used for many years as a lingua franca, and has been particularly successful in the field of science. It has also been used as a language of international communication by organisations such as the UN.
The language continues to be developed and maintained by its small but dedicated community of speakers.