Interlingua, Instrumento Moderne de Communication International
Interlingua, Instrumento Moderne de Communication International by Ingvar Stenström is an Interlingua course. As of 2006, it has been translated into Bulgarian, Danish, French, German, Hungarian, Portuguese, Romanian, Russian, and Swedish; translations into Norwegian and Lithuanian are in final preparation, and five additional languages are expected to follow.
Source: Wikipedia — Interlingua, Instrumento Moderne de Communication International (CC BY-SA 4.0)