Cooperative Dictionary of the Rhinelandic Colloquial Language information

The Cooperative Dictionary of the Rhinelandic Colloquial Language (Mitmachwörterbuch der rheinischen Umgangssprache) was a website that both documents and collects data on the current distinct variety of German used colloquially in the Rhineland region - where some 15 million speakers live.

It is run by the Landschaftsverband Rheinland (LVR), a public body of municipal self governance of the Rhineland in West of North Rhine-Westphalia in Western Germany, under the auspices of the Bureau of Research and Documentation of the Rhineland (Amt für rheinische Landeskunde); and is the first of its kind - replacing interviews with individual speakers, or questionnaires, by an interactive web application quasi anonymously collecting scientific evidence about a contemporary language.

The Project started the interactive World Wide Web site towards the end of February 2007.